Question

How do you write `y=2x^2+4x-5` in vertex form and identify the vertex, y intercept and x intercept?

Answer 1

`y = 2x^2 + 4x - 5`
.
x of vertex: `x = (-b/2a) = -4/4 = -1`

y of vertex: `y = f(-1) = 2 - 4 - 5 = - 7`

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