# What is the vertex form of #y= x^2 + 3x - 28 #?

##### 1 Answer

Jan 28, 2016

#### Explanation:

The vertex form for a parabolic equation is:

with vertex at

Given:

Complete the square:

Rewrite as a squared binomial plus a (simplified) constant

graph{x^2+3x-28 [-41.75, 40.47, -40.33, 0.74]}