Saxon Advanced Math
Pascall’s Triangle for finding coefficients of the terms when expanding.
The Binomial Theorem to find the coefficients of the expression without drawing out Pascall’s triangle. This is good for higher powers.
Watch this video if you need a reminder of using Pascall’s Triangle to find coefficients of binomial expansion. At 18:45 he shows how Pascall’s triangle relates to the binomial theorem.
This is the Binomial Theorem Explained
SOTW and Other Resources 