Question

What is the vertex form of `y=(x+4)(2x-1)`?

Answer 1

`y=2(x+7/4)^2-81/8`

Explanation:

First you need to expan this function
`y=2x^2+7x-4`
And I need to transform this function into this type like
`y=a(x-h)^2+k`
So
`y=2(x^2+7/2x)-4`
`y=2(x^2+7/2x+49/16)-4-49/8`
Final
`y=2(x+7/4)^2-81/8`