Discovering the Product Representation of f(x) = x^2 - 7x + 12

Find the representation of the product of the following function

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

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Step-by-step video solution

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00:00 Convert trinom to multiplication
00:04 Identify the trinom coefficients
00:07 We want to find 2 numbers whose sum equals coefficient B
00:12 and their product equals coefficient C
00:16 These are the matching numbers, let's substitute in the multiplication
00:23 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Find the representation of the product of the following function

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

2

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) .

3

Final Answer

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

Practice Quiz

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Create an algebraic expression based on the following parameters:

\( a=3,b=6,c=9 \)

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