HL 3.7 - Binomial theorem
SL 1.9: The binomial theorem; binomial expansions {\left( {a + b} \right)^n},\;n \in \mathbb{N} ; use of Pascal’s triangle and {}^n{{\textrm{C}}_r} (also written as {}_n{{\textrm{C}}_r} ). Compute {}_n{{\textrm{C}}_r} using both the formula and technology.HL 1.10: Extension of the binomial theorem to fractional and negative indices. A binomial expression is the sum of two terms – such as x + 1 , 2y - 3 , a + b , etc....