How to expand (a+b)^n (Binomial Theorem with a combinatoric approach)

How to expand (a+b)^n? Well, we can use the binomial theorem and let me show you how! This video also features Pascal's Triangle, a combinatoric argument, and how to find the coefficient of a term in an expansion. Coming up next, we will an Extreme Algebra part 2, the Generalized Binomial Theorem!

Binomial and trinomial theorem:
Part 1:    • How to expand (a+b)^n (Binomial Theor...  
part 2 (ft. best friend):    • Can we really do "-2 choose 5"? Gener...  
part 3:    • the easy way to expand (a+b+c)^n, the...  
Bonus part: coming soon

0:00 (a+b)^2=a^2+b^2?
7:53 explaining the binomial coefficient
13:52 finding the coefficient of x^2y^3 in (2x+y)^5

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