# How do you solve #3x^2-27=0# by factoring?

##### 1 Answer

Mar 19, 2018

#### Explanation:

We can factor out a

What I have in blue is called a **Difference of Squares**. What this means is that if I have the binomial

Then it can be factored as

In our example,

Since

Setting each factor equal to zero, we get:

If the concept of a **"Difference of Squares"** seems foreign to you, I encourage you to Google it or search it on Khan Academy to make sure you understand it.

Hope this helps!