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