Question

What is `y=x^2 + 10x + 23` in vertex form?

Answer 1

`y = (x - -5)^2 - 2`

Explanation:

Add `h^2 - h^2` to the equation:

`y = x^2 + 10x + h^2 - h^2 + 23`

`h = -b/(2a) = -10/2 = -5`

`y = (x - -5)^2 - 25 + 23`

`y = (x - -5)^2 - 2`