Question

For what value of h is y=x2−4x+8 equivalent to y=(x−h)2+4 ?

A = 2
B = 3
C = 0
D = 1
E = 4

Answer 1

`a = 2 \\ \\ y = {x}^(2) - 4x + 8 \\ \\ = 2`

Answer 2

• A. 2

Explanation:

Convert the given function into vertex form:

• y = x² - 4x + 8 = x² - 4x + 4 + 4 = (x - 2)² + 4

Comparing the equations we see h = 2.

Correct choice is A