Question

What is the vertex form of #y=2x^2+12x-13 ?

Answer 1

`y = 2(x + 3)^2 - 31`

Explanation:

x-coordinate of vertex:
`x = -b/(2a) = -12/4 = -3`
y-coordinate of vertex:
y(-3) = 2(9) - 12(3) - 13 = -18 - 13 = -31

Vertex form:`y = 2(x + 3)^2 - 31.`