Question

What is the vertex form of `y= (x-14)(3x+4)-x^2+2x`?

Answer 1

`y=2(x-9)^2-218`

Explanation:

`y=3x^2+4x-42x-56-x^2+2x=2x^2-36x-56`

If we complete the square with thefirst two terms

`y=2(x-9)^2-162-56=2(x-9)^2-218`