Question

What is the vertex form of # f(x) = -5x^2-x-12 #?

Answer 1

`f(x)=-5(x+1/10)^2-239/20`

Explanation:

`f(x)=-5(x^2+1/5x)-12`
`=-5(x^2+1/5x+1/100)-12+1/20`
`=-5(x+1/10)^2-239/20`