# How do you find the roots, real and imaginary, of #y=(x-1)(x+1)# using the quadratic formula?

##### 1 Answer

Dec 19, 2017

#### Answer:

#### Explanation:

The roots of the equation occur when

i.e. where

This is clearly

However, in this question we are asked to use the quadratic formula which states that where

In our case;

Hence,

Using the quadratic formula: