# How do you find the roots, real and imaginary, of #y= 4x^2-36 # using the quadratic formula?

##### 1 Answer

Dec 17, 2015

#### Explanation:

The quadratic formula:

for the quadratic equation in the general form

Your equation does not seem to fit this mold, but it can be rewritten as

So,

Plug these into the formula.

These are the two real roots.