Binomial Theorem (Step-by-Step)

The binomial theorem says that for positive integer n, (((x + y))^n)=(∑_(k=0)^n)(({{n}, {k}}))(x^k)(y^(n-k)), where (({{n}, {k}}))=((n!)/(k! (n - k)!)).  This widely useful result is illustrated here through termwise expansion.

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Contributed by: Bruce Colletti

Additional contributions by: Jeff Bryant

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