Product Representation: Transition between different representations of a function

Examples with solutions for Product Representation: Transition between different representations of a function

Exercise #1

Find the standard representation of the following function

f(x)=(x2)(x+5) f(x)=(x-2)(x+5)

Video Solution

Step-by-Step Solution

We will begin by using the distributive property in order to expand the following expression.

(a+1)⋆(b+2) = ab+2a+b+2

We will then proceed to insert the known values into the equation and solve as follows:

(x-2)(x+5) =

x²-2x+5x+-2*5=

x²+3x-10

And that's the solution!

Answer

f(x)+x2+3x10 f(x)+x^2+3x-10

Exercise #2

Find the standard representation of the following function

f(x)=(x6)(x2) f(x)=(x-6)(x-2)

Video Solution

Step-by-Step Solution

To find the standard representation of the quadratic function f(x)=(x6)(x2) f(x) = (x - 6)(x - 2) , follow these steps:

  • Step 1: Apply the FOIL method to expand the expression.
    - First: Multiply the first terms: x×x=x2 x \times x = x^2 .
    - Outside: Multiply the outer terms: x×(2)=2x x \times (-2) = -2x .
    - Inside: Multiply the inner terms: (6)×x=6x (-6) \times x = -6x .
    - Last: Multiply the last terms: (6)×(2)=12 (-6) \times (-2) = 12 .
  • Step 2: Combine the results from the FOIL method.
    - Combine all the expanded terms: x22x6x+12 x^2 - 2x - 6x + 12 .
  • Step 3: Simplify by combining like terms.
    - Combine the x x -terms: 2x6x=8x -2x - 6x = -8x .
    - The expanded and simplified form is: f(x)=x28x+12 f(x) = x^2 - 8x + 12 .

By expanding and simplifying the given product, we have converted it to its standard form. Therefore, the standard representation of the function is f(x)=x28x+12 f(x) = x^2 - 8x + 12 .

The correct choice from the provided options is choice 2: f(x)=x28x+12 f(x) = x^2 - 8x + 12 .

Answer

f(x)=x28x+12 f(x)=x^2-8x+12

Exercise #3

Find the standard representation of the following function

f(x)=(x+2)(x4) f(x)=(x+2)(x-4)

Video Solution

Step-by-Step Solution

To find the standard representation of the quadratic function given by f(x)=(x+2)(x4) f(x) = (x+2)(x-4) , we will expand the expression using the distributive property, commonly known as the FOIL method (First, Outer, Inner, Last):

  • First: Multiply the first terms in each binomial: xx=x2 x \cdot x = x^2 .
  • Outer: Multiply the outer terms in the binomials: x(4)=4x x \cdot (-4) = -4x .
  • Inner: Multiply the inner terms: 2x=2x 2 \cdot x = 2x .
  • Last: Multiply the last terms in each binomial: 2(4)=8 2 \cdot (-4) = -8 .

Now, let's combine these results:

The expression becomes x24x+2x8 x^2 - 4x + 2x - 8 .

Next, we combine like terms:

The terms involving x x are 4x+2x -4x + 2x , which simplifies to 2x -2x .

Thus, the expression simplifies to: f(x)=x22x8 f(x) = x^2 - 2x - 8

Upon comparing this result to the provided choices, we find that it matches choice 3.

Therefore, the standard representation of the function is f(x)=x22x8 f(x) = x^2 - 2x - 8 .

Answer

f(x)=x22x8 f(x)=x^2-2x-8

Exercise #4

Find the standard representation of the following function

f(x)=3x(x+4) f(x)=3x(x+4)

Video Solution

Step-by-Step Solution

To find the standard representation of the quadratic function f(x)=3x(x+4) f(x) = 3x(x + 4) , follow these steps:

  • Step 1: Apply the distributive property to expand the expression x(x+4) x(x + 4) .
    Using this property, we have:
    x(x+4)=xx+x4=x2+4x x(x + 4) = x \cdot x + x \cdot 4 = x^2 + 4x .
  • Step 2: Multiply each term by the coefficient outside the parenthesis, which is 3.
    This gives us:
    3(x2+4x)=3x2+34x 3(x^2 + 4x) = 3 \cdot x^2 + 3 \cdot 4x .
  • Step 3: Simplify by performing the multiplication.
    3x2+12x 3x^2 + 12x .

Therefore, the standard representation of the function is f(x)=3x2+12x f(x) = 3x^2 + 12x . This matches choice 3 in the provided answers.

Answer

f(x)=3x2+12x f(x)=3x^2+12x

Exercise #5

Find the standard representation of the following function

f(x)=x(x8) f(x)=-x(x-8)

Video Solution

Step-by-Step Solution

To solve this problem, we'll convert the given function from its factored form to the standard form using the distributive property. The given function is f(x)=x(x8) f(x) = -x(x - 8) .

Let's go through the necessary steps:

  • Step 1: Apply the distributive property to expand the expression.
    f(x)=x(x8)=xx+(x)(8) f(x) = -x(x - 8) = -x \cdot x + (-x) \cdot (-8)
  • Step 2: Simplify each term.
    xx=x2-x \cdot x = -x^2 and (x)(8)=+8x(-x) \cdot (-8) = +8x.
  • Step 3: Combine the terms to express f(x) f(x) in standard form:
    f(x)=x2+8x f(x) = -x^2 + 8x .

Therefore, the standard representation of the function is f(x)=x2+8x f(x) = -x^2 + 8x .

Comparing this result to the multiple-choice options, we can see that the correct choice is option 3: f(x)=x2+8x f(x)=-x^2+8x .

Answer

f(x)=x2+8x f(x)=-x^2+8x

Exercise #6

Find the standard representation of the following function

f(x)=(x+1)(x1) f(x)=(x+1)(x-1)

Video Solution

Step-by-Step Solution

To solve this problem and find the standard representation of the function f(x)=(x+1)(x1) f(x) = (x+1)(x-1) , we will expand the product using the distributive property, often recalled as FOIL (First, Outer, Inner, Last) for the product of two binomials.

Let's proceed step-by-step:

  • Step 1: Apply the distributive property:
    f(x)=(x+1)(x1) f(x) = (x+1)(x-1) would become:
  • First terms: xx=x2 x \cdot x = x^2
  • Outer terms: x(1)=x x \cdot (-1) = -x
  • Inner terms: 1x=x 1 \cdot x = x
  • Last terms: 1(1)=1 1 \cdot (-1) = -1

Step 2: Combine all the terms obtained from the FOIL method:
x2x+x1 x^2 - x + x - 1

Step 3: Simplify the expression by combining like terms:
The terms x-x and xx cancel each other out, simplifying to:
f(x)=x21 f(x) = x^2 - 1

Thus, the standard representation of the function is f(x)=x21 f(x) = x^2 - 1 .

Answer

f(x)=x21 f(x)=x^2-1

Exercise #7

Find the standard representation of the following function

f(x)=(2x+1)(x2) f(x)=(2x+1)(x-2)

Video Solution

Step-by-Step Solution

To find the standard representation of the function f(x)=(2x+1)(x2) f(x) = (2x + 1)(x - 2) , we'll follow these steps to expand and simplify the expression:

  • Step 1: Distribute each term of the first binomial over each term of the second binomial using the FOIL method.
  • Step 2: Combine like terms to express the function in standard quadratic form.

Now, let's expand the expression:
1. Multiply the first terms: 2xx=2x2 2x \cdot x = 2x^2
2. Multiply the outer terms: 2x(2)=4x 2x \cdot (-2) = -4x
3. Multiply the inner terms: 1x=x 1 \cdot x = x
4. Multiply the last terms: 1(2)=2 1 \cdot (-2) = -2

Next, we combine these results:
- The 2x2 2x^2 term remains as is.
- Add the linear terms: 4x+x=3x -4x + x = -3x
- The constant term is 2-2.

Thus, the expanded and simplified form of the function is:
f(x)=2x23x2 f(x) = 2x^2 - 3x - 2

The final expression in standard form is f(x)=2x23x2 f(x) = 2x^2 - 3x - 2 .

Answer

f(x)=2x23x2 f(x)=2x^2-3x-2

Exercise #8

Find the standard representation of the following function

f(x)=(x+3)(x4) f(x)=(x+3)(-x-4)

Video Solution

Step-by-Step Solution

To find the standard form of the given quadratic function f(x)=(x+3)(x4) f(x) = (x+3)(-x-4) , we will expand it using the distributive property.

Step 1: Expand the product.
Using the distributive property (or FOIL method):

f(x)=(x+3)(x4) f(x) = (x+3)(-x-4)

Apply distribution:
First: xx=x2 x \cdot -x = -x^2
Outside: x4=4x x \cdot -4 = -4x
Inside: 3x=3x 3 \cdot -x = -3x
Last: 34=12 3 \cdot -4 = -12

Step 2: Combine all terms together:

f(x)=x24x3x12 f(x) = -x^2 - 4x - 3x - 12

Step 3: Simplify by combining like terms:
Combine the x x terms:

f(x)=x27x12 f(x) = -x^2 - 7x - 12

Therefore, the standard representation of the function is f(x)=x27x12 f(x) = -x^2 - 7x - 12 .

The correct choice from the given options is choice 4.

f(x)=x27x12 f(x)=-x^2-7x-12

Answer

f(x)=x27x12 f(x)=-x^2-7x-12

Exercise #9

Find the representation of the product of the following function

f(x)=x27x+12 f(x)=x^2-7x+12

Video Solution

Step-by-Step Solution

To solve the problem of finding the product (factored) representation of the quadratic function f(x)=x27x+12 f(x) = x^2 - 7x + 12 , we proceed as follows:

  • Step 1: Identify the function, which is f(x)=x27x+12 f(x) = x^2 - 7x + 12 .
  • Step 2: We need to factor this quadratic expression. We're looking for two numbers whose product is 12 and whose sum is -7.
  • Step 3: The factor pairs of 12 are (1,12)(1, 12), (2,6)(2, 6), (3,4)(3, 4), including negative pairs because the sum must be negative.
  • Step 4: Consider the pair (3,4)(-3, -4). The product (3)×(4)(-3) \times (-4) equals 12, and the sum (3)+(4)(-3) + (-4) equals -7.

Therefore, the factors of the quadratic expression are x3 x - 3 and x4 x - 4 . This implies that the function f(x) f(x) can be expressed in product form as:

f(x)=(x3)(x4) f(x) = (x - 3)(x - 4)

This means the correct factorization is (x3)(x4)(x - 3)(x - 4), which corresponds to choice 3 from the given options.

Thus, the representation of the product of the function is (x3)(x4) (x - 3)(x - 4) .

Answer

(x3)(x4) (x-3)(x-4)

Exercise #10

Find the representation of the product of the following function

f(x)=x22x3 f(x)=x^2-2x-3

Video Solution

Step-by-Step Solution

The problem requires finding the product representation of the quadratic function f(x)=x22x3 f(x) = x^2 - 2x - 3 .

Let's execute the factorization of the quadratic equation:

  • The standard form for the function is f(x)=ax2+bx+c f(x) = ax^2 + bx + c . Here, a=1 a = 1 , b=2 b = -2 , c=3 c = -3 .
  • We seek two numbers that multiply to c=3 c = -3 and sum to b=2 b = -2 .
  • Checking possible integer pairs: (3,1)(-3, 1) can accomplish this, since 3×1=3-3 \times 1 = -3 and 3+1=2-3 + 1 = -2.
  • The factorization becomes f(x)=(x3)(x+1) f(x) = (x - 3)(x + 1) .

To verify, we can expand the binomials:

(x3)(x+1)=x2+x3x3=x22x3(x - 3)(x + 1) = x^2 + x - 3x - 3 = x^2 - 2x - 3.

This matches the original polynomial, confirming the product representation is correct.

In conclusion, the factorization or product representation of the given quadratic function is (x3)(x+1)\mathbf{(x-3)(x+1)}.

Answer

(x3)(x+1) (x-3)(x+1)

Exercise #11

Find the representation of the product of the following function

f(x)=x23x18 f(x)=x^2-3x-18

Video Solution

Step-by-Step Solution

To solve the problem of factoring the quadratic expression f(x)=x23x18 f(x) = x^2 - 3x - 18 , we will use the following method:

  • Step 1: Identify and understand the quadratic expression, which is given in standard form: ax2+bx+c ax^2 + bx + c . For this expression, a=1 a = 1 , b=3 b = -3 , and c=18 c = -18 .
  • Step 2: Compute the product of a a and c c , which yields 1(18)=18 1 \cdot (-18) = -18 . We need to find two numbers whose product is 18-18 and whose sum is 3-3.
  • Step 3: Look for pairs of factors of 18-18: - 1,181, -18 - 1,18-1, 18 - 2,92, -9 - 2,9-2, 9 - 3,63, -6 - 3,6-3, 6
  • Among these, the pair (3,6) (3, -6) adds up to 3-3 and multiplies to 18-18.

  • Step 4: Rewrite the quadratic expression using these numbers to represent the middle term:
    x23x18=x2+3x6x18 x^2 - 3x - 18 = x^2 + 3x - 6x - 18 .
  • Step 5: Group the terms to facilitate factoring:
    (x2+3x)+(6x18) (x^2 + 3x) + (-6x - 18) .
  • Step 6: Factor out the common factors in each grouped terms:
    x(x+3)6(x+3) x(x + 3) - 6(x + 3) .
  • Step 7: Factor out the common binomial:
    (x6)(x+3)(x - 6)(x + 3).

Therefore, the factorized form of the quadratic function f(x)=x23x18 f(x) = x^2 - 3x - 18 is (x6)(x+3) (x - 6)(x + 3) .

Answer

(x6)(x+3) (x-6)(x+3)

Exercise #12

Find the representation of the product of the following function

f(x)=x2+x2 f(x)=x^2+x-2

Video Solution

Step-by-Step Solution

To determine the product representation of f(x)=x2+x2 f(x) = x^2 + x - 2 , we can factor the quadratic equation by following these steps:

  • Step 1: Identify the product ac=1×(2)=2 ac = 1 \times (-2) = -2 and sum b=1 b = 1 .
  • Step 2: Find two numbers that multiply to 2-2 and add to 11. These numbers are 22 and 1-1.
  • Step 3: Rewrite the middle term using these numbers: x2+2x1x2 x^2 + 2x - 1x - 2 .
  • Step 4: Factor by grouping:
    - Group x2+2x x^2 + 2x and 1x2-1x - 2 as separate pairs:
    - x(x+2)1(x+2) x(x + 2) - 1(x + 2) .
  • Step 5: Factor out the common terms:
    (x+2)(x1)(x + 2)(x - 1).

Thus, the product representation of the function is (x+2)(x1) (x + 2)(x - 1) .

Answer

(x+2)(x1) (x+2)(x-1)

Exercise #13

Find the standard representation of the following function

f(x)=(x+2)(x+3) f(x)=(-x+2)(x+3)

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Use the FOIL method to expand the product of binomials.
  • Step 2: Combine like terms to simplify the expression.

Now, let's work through each step:

Step 1: Expand the product (x+2)(x+3)(-x+2)(x+3) using the FOIL method:
First terms: xx=x2-x \cdot x = -x^2
Outer terms: x3=3x-x \cdot 3 = -3x
Inner terms: 2x=2x2 \cdot x = 2x
Last terms: 23=62 \cdot 3 = 6

This gives us the expression:
x23x+2x+6 -x^2 - 3x + 2x + 6

Step 2: Combine like terms:
Combine 3x-3x and 2x2x to get x-x.
Thus, the expression simplifies to:
x2x+6 -x^2 - x + 6

Therefore, the standard form of the function is f(x)=x2x+6 f(x) = -x^2 - x + 6 .

Answer

f(x)=x2x+6 f(x)=-x^2-x+6

Exercise #14

Find the standard representation of the following function

f(x)=(x+1)(x1) f(x)=-(x+1)(x-1)

Video Solution

Step-by-Step Solution

To solve this problem, we need to convert the given function f(x)=(x+1)(x1) f(x) = -(x+1)(x-1) from its current product form to standard form.

Let's follow these steps:

  • Step 1: Recognize that the expression (x+1)(x1) (x+1)(x-1) is a standard difference of squares formula, expressed as (a+b)(ab)=a2b2 (a+b)(a-b) = a^2 - b^2 , where a=x a = x and b=1 b = 1 .
  • Step 2: According to the formula, (x+1)(x1)=x212=x21 (x+1)(x-1) = x^2 - 1^2 = x^2 - 1 .
  • Step 3: Substitute this result back into the function: f(x)=(x21) f(x) = -(x^2 - 1) .
  • Step 4: Simplify the expression by distributing the negative sign: (x21)=x2+1 -(x^2 - 1) = -x^2 + 1 .

Therefore, the function in its standard form is f(x)=x2+1 f(x) = -x^2 + 1 .

This matches with choice 1: f(x)=x2+1 f(x)=-x^2+1 .

Answer

f(x)=x2+1 f(x)=-x^2+1

Exercise #15

Find the representation of the product of the following function

f(x)=x2+12x+32 f(x)=x^2+12x+32

Video Solution

Step-by-Step Solution

To solve the problem of factoring the quadratic expression f(x)=x2+12x+32 f(x) = x^2 + 12x + 32 , we will follow these steps:

  • Identify the pairs of integers whose product is 32.
  • Find the pair that also adds up to 12.
  • Use this pair to express the quadratic in its factored form.

Let's proceed with these steps:

Step 1: List all pairs of integers that multiply to 32:
1 and 32
2 and 16
4 and 8

Step 2: Determine which pair of these adds up to 12:
Checking each:
1+32=33 1 + 32 = 33
2+16=18 2 + 16 = 18
4+8=12 4 + 8 = 12

The pair 4 and 8 adds up to 12.

Step 3: Use this pair to factor the quadratic expression:
Thus, f(x)=(x+4)(x+8) f(x) = (x + 4)(x + 8) .

Therefore, the factored form of f(x)=x2+12x+32 f(x) = x^2 + 12x + 32 is (x+8)(x+4) (x + 8)(x + 4) .

Answer

(x+8)(x+4) (x+8)(x+4)

Exercise #16

Find the representation of the product of the following function

f(x)=x216x+64 f(x)=x^2-16x+64

Video Solution

Step-by-Step Solution

To find the product representation of the function f(x)=x216x+64 f(x) = x^2 - 16x + 64 , we expect it to be a perfect square trinomial.

First, recognize that the given quadratic form is a22ab+b2 a^2 - 2ab + b^2 . Comparing it with x216x+64 x^2 - 16x + 64 :

  • The first term x2 x^2 suggests a=x a = x .
  • The middle term 16x-16x can be interpreted as 2ab-2ab. So, 2a=16-2a = -16, solving gives 2b=16 2b = 16, hence b=8 b = 8 .
  • The last term (64)(64) is b2 b^2, confirms that 82=64 8^2 = 64 .

This means our expression is:

  • f(x)=(x8)2 f(x) = (x - 8)^2

Thus, the product form or factored representation of the function is (x8)2 (x-8)^2 .

The final answer is: (x8)2 (x-8)^2 .

Answer

(x8)2 (x-8)^2

Exercise #17

Find the representation of the product of the following function

f(x)=x25x50 f(x)=x^2-5x-50

Video Solution

Step-by-Step Solution

To solve this problem, we will factor the quadratic function f(x)=x25x50 f(x) = x^2 - 5x - 50 into two binomials:

  • Step 1: Identify the values of a=1 a = 1 , b=5 b = -5 , and c=50 c = -50 in the quadratic expression ax2+bx+c ax^2 + bx + c .
  • Step 2: We look for two numbers that multiply to c=50 c = -50 and add up to b=5 b = -5 .
  • Step 3: Consider the factor pairs of 50 -50 . Possible pairs include (1,50) (-1, 50) , (1,50) (1, -50) , (2,25) (-2, 25) , (2,25) (2, -25) , (5,10) (-5, 10) , and (5,10) (5, -10) .
  • Step 4: The correct pair is (5,10) (5, -10) because 5×(10)=50 5 \times (-10) = -50 and 5+(10)=5 5 + (-10) = -5 .
  • Step 5: Express f(x) f(x) in its factored form using these numbers: f(x)=(x+5)(x10) f(x) = (x + 5)(x - 10) .
  • Step 6: Verify the factorization by expanding: (x+5)(x10)=x210x+5x50(x + 5)(x - 10) = x^2 - 10x + 5x - 50, which simplifies to x25x50 x^2 - 5x - 50, confirming correctness.

Therefore, the correct factorization of the quadratic f(x)=x25x50 f(x) = x^2 - 5x - 50 is (x+5)(x10)(x + 5)(x - 10).

Thus, the product representation of the function is (x+5)(x10) (x+5)(x-10) .

Answer

(x+5)(x10) (x+5)(x-10)

Exercise #18

Find the representation of the product of the following function

f(x)=x26x+9 f(x)=x^2-6x+9

Video Solution

Step-by-Step Solution

To solve this problem, we need to express the quadratic function f(x)=x26x+9 f(x) = x^2 - 6x + 9 as a product of binomials.

First, observe whether the expression can be written as a perfect square trinomial. It helps to compare it with the standard perfect square form: (xa)2=x22ax+a2 (x-a)^2 = x^2 - 2ax + a^2 .

In our quadratic, we have:

  • The quadratic term x2 x^2 matches exactly.
  • The linear term 6x-6x suggests 2a=6 -2a = -6 . Solving for a a , we have a=3 a = 3 . Hence, the expression of vertex form should be (x3)2(x-3)^2.
  • The constant term is 9 9 . In a perfect square trinomial, this term would also be 32=9 3^2 = 9 , which fits perfectly.

Thus, the original quadratic function x26x+9 x^2 - 6x + 9 can be rewritten as a squared binomial: (x3)2 (x-3)^2 .

Our detailed work confirms that the representation of the function is (x3)2 (x-3)^2 . This matches with choice 4.

Therefore, the product representation of the function is (x3)2 \boldsymbol{(x-3)^2} .

Answer

(x3)2 (x-3)^2

Exercise #19

Find the representation of the product of the following function

f(x)=x23x4 f(x)=x^2-3x-4

Video Solution

Step-by-Step Solution

To solve this problem, let's follow these steps:

  • Step 1: Identify the coefficients: a=1 a = 1 , b=3 b = -3 , c=4 c = -4 .
  • Step 2: Calculate the product ac=1×4=4 ac = 1 \times -4 = -4 and the sum b=3 b = -3 .
  • Step 3: Find two numbers that multiply to 4-4 and add to 3-3. These numbers are 4-4 and 11.
  • Step 4: Rewrite the middle term 3x-3x using 4-4 and 11 as 4x+x-4x + x.
  • Step 5: Factor by grouping: (x24x)+(x4) (x^2 - 4x) + (x - 4) .
  • Step 6: Factor out common factors: x(x4)+1(x4) x(x - 4) + 1(x - 4) .
  • Step 7: Notice the common binomial factor: (x4)(x+1) (x - 4)(x + 1) .

Therefore, the factored form of the quadratic function f(x)=x23x4 f(x) = x^2 - 3x - 4 is (x4)(x+1) (x - 4)(x + 1) , which corresponds to choice 3.

Answer

(x4)(x+1) (x-4)(x+1)

Exercise #20

Find the representation of the product of the following function

f(x)=x2+11x+28 f(x)=x^2+11x+28

Video Solution

Step-by-Step Solution

To solve this problem, we need to find a product representation of the quadratic function f(x)=x2+11x+28 f(x) = x^2 + 11x + 28 .

Let's go through the problem-solving process step-by-step:

1. We need to express the given quadratic function f(x)=x2+11x+28 f(x) = x^2 + 11x + 28 as a product of two binomials. 2. Key information includes the coefficients of the terms in the quadratic: 1 for x2 x^2 , 11 for x x , and 28 for the constant term. 3. The approach is to factor the quadratic expression. 4. Key formula: For a quadratic expression ax2+bx+c ax^2 + bx + c , the product of factors (x+p)(x+q) (x+p)(x+q) requires that p+q=b/a p+q = b/a and pq=c/a pq = c/a . 5. Factoring by finding two numbers whose sum is 11 and product is 28. 6. Steps: Find two numbers that satisfy the conditions p+q=11 p+q = 11 and pq=28 pq = 28 . 7. Assumptions: The quadratic can be factored into real numbers. 8. Consider pairs of factors of 28: (1,28),(2,14),(4,7),(1,28),(2,14),(4,7) (1, 28), (2, 14), (4, 7), (-1, -28), (-2, -14), (-4, -7) . 9. Edge cases: Check that potential factors satisfy both conditions. 10. We consider only the choices since the problem is a multiple-choice. 11. For multiple-choice questions, find the correct pair of numbers by testing the conditions. 12. Common mistakes might include not correctly identifying factor pairs or choosing incorrect signs. 13. Changes in coefficients would alter the factor pairs needed to produce the correct sum and product.

Now let's address the problem:

To find the correct binomial factors of f(x)=x2+11x+28 f(x) = x^2 + 11x + 28 , we are searching for two numbers that multiply to 28 and add to 11. Examining possible pairs, 4 4 and 7 7 meet these criteria: 4×7=28 4 \times 7 = 28 and 4+7=11 4 + 7 = 11 .

Thus, the quadratic expression can be rewritten as:

f(x)=(x+4)(x+7) f(x) = (x + 4)(x + 7)

This checks our desired conditions. Multiplication confirms: (x+4)(x+7)=x2+7x+4x+28=x2+11x+28(x+4)(x+7) = x^2 + 7x + 4x + 28 = x^2 + 11x + 28, which matches the original function.

Therefore, the product representation of f(x)=x2+11x+28 f(x) = x^2 + 11x + 28 is (x+7)(x+4) (x+7)(x+4) .

Answer

(x+7)(x+4) (x+7)(x+4)