Question

How do you write `2x^2+4x-5` into vertex form?

Answer 1

`(-b/2a) = -4/4 = -1`

`f(-b/2a) = f(-1) = 2 - 4 - 5 = -7`

Factored form: `f(x) = 2(x + 1)^2 - 7`

Check:
Develop `f(x) = 2(x^2 + 2x + 1) -5 = 2x^2 + 4x - 5`. Correct