# What is the vertex form of #y=3x^2-39x-90 #?

##### 2 Answers

#### Explanation:

The general vertex form is

Given:

extract the dispersion factor (

complete the square

re-writing the first term as a constant times a squared binomial

and evaluating

**Vertex form of equation is**

#### Explanation:

Vertex is

Vertex form of equation is

graph{3x^2-39x-90 [-640, 640, -320, 320]} [Ans]