We're going to need this for the next lesson.
We'll need to multiply guys like
There's an easy process we can use called FOIL.
F | = | First |
O | = | Outer |
I | = | Inner |
L | = | Last |
You can use this process anytime you multiply two things that are added or subtracted inside of two sets of parentheses. Boy, that sounds confusing! Like this: