Question

Y=x^2+2x-15 in vertex form

Answer 1

Answer: x(2+2x-15)

Explanation:

This is what I believe to be the answer but it would help if it was multiple choice

Answer 2

The vertex form is:

`y = {(x + 1)}^(2) - 16`

EXPLANATION

The given function is:

`y = {x}^(2) + 2x - 15`

Add and subtract the square of half the coefficient of x.

`y = {x}^(2) + 2x + ( {1)}^(2) - {(1)}^(2) - 15`

The first three terms for a quadratic trinomial.

`y = {(x + 1)}^(2) - 16`

This is now in the form

`y = a(x - h) ^(2) + k`

where (h,k)=(-1,-16) is the vertex