Question

What is the vertex form of `y=(2x+2)(x-1)`?

Answer 1

`y=2(x-0)^2+(-2)`

Explanation:

`y=(2x+2)(x-1)`

`rArr y=2x^2 +2x -2x -2`

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

`rArr y=color(green)2(x-color(red)0)^2+color(blue)(""(-2))`
which is the vertex form with vertex at `(color(red)0,color(blue)(-2))`
graph{(2x+2)(x-1) [-3.168, 5.604, -2.238, 2.145]}