1. Stumped

So I skipped over this question after 10 minutes of frustration.
Help would be really appreciated =).

Factor:
X^2 - 20

thanks.

2. Originally Posted by 4kVoX
So I skipped over this question after 10 minutes of frustration.
Help would be really appreciated =).

Factor:
X^2 - 20

thanks.
Two things:

1. $x^2 - 20 = x^2 - (\sqrt{20})^2$.

2. $A^2 - B^2 = (A - B)(A + B)$.