# What is the vertex form of #y= x^2-x-20 #?

##### 1 Answer

Jun 10, 2016

#### Explanation:

The vertex or turning point is the relative extreme point of the function and occurs at the point where the derivative of the function is zero.

That is, when

ie when

The corresponding y values is then

Since the coefficient of

The corresponding graph is given for completeness.

graph{x^2-x-20 [-11.95, 39.39, -22.35, 3.28]}