# How do you graph #y=x^2-2x-8#?

##### 1 Answer

Jan 2, 2018

Refer explanation.

#### Explanation:

**METHOD 1: ALGEBRA**

As coefficient of

Check discriminant of the quadratic to examine the nature of the roots.

As

Here,

The minima of the above quadatic is at

The value of quadratic at minima

By analysing above all points graph will be

graph{x^2-2x-8 [-25.65, 25.65, -12.83, 12.82]}

**METHOD 2:CALCULUS**

Find