Find the Standard Form of the Function Equation: Rewrite f(x) = (-x+1)²+3

Question

Find the standard representation of the following function

f(x)=(x+1)2+3 f(x)=(-x+1)^2+3

Video Solution

Step-by-Step Solution

To convert the function f(x)=(x+1)2+3 f(x) = (-x + 1)^2 + 3 to its standard form, follow these steps:

Step 1: Expand the binomial (x+1)2(-x + 1)^2.
(x+1)2=(x)2+2(x)(1)+12 (-x + 1)^2 = (-x)^2 + 2(-x)(1) + 1^2

This simplifies to:
(x)2=x2 (-x)^2 = x^2
2(x)(1)=2x 2(-x)(1) = -2x
12=1 1^2 = 1

Combining these terms gives:
(x+1)2=x22x+1 (-x + 1)^2 = x^2 - 2x + 1

Step 2: Add the constant term +3+3 to the expanded form:
f(x)=(x22x+1)+3 f(x) = (x^2 - 2x + 1) + 3

Step 3: Simplify the expression:
f(x)=x22x+1+3=x22x+4 f(x) = x^2 - 2x + 1 + 3 = x^2 - 2x + 4

Thus, the standard representation of the function is f(x)=x22x+4 f(x) = x^2 - 2x + 4 .

Answer

f(x)=x22x+4 f(x)=x^2-2x+4