Question

The first three steps in writing f(x) = 40x + 5x2 in vertex form are shown. What is the function written in vertex form?

Answer 1

f(x) = 5 ( x +4)²- 80 in vertex form

Explanation:

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Answer 2

f(x) = 5(x + 4) – 80
f(x) = 5(x + 8) – 80
f(x) = 5(x + 4)2 – 80
f(x) = 5(x + 8)2 – 80