# How do you find the roots, real and imaginary, of #y= 2x^2 - 2x -1 # using the quadratic formula?

##### 1 Answer

May 31, 2016

#### Explanation:

The quadratic formula is

where a, b, and c correspond to the coefficients in the equation

In this case,

Now because the discriminant (the thing in the square root) does not equal zero, there are two answers, namely

which can be simplified to