The binomial theorem states that an expression of the form (a x + b y) n may be expanded as follows.
(ax + by) n = (ax) n + n (ax) n - 1 (by) + ...
+ n C r (ax) n - r (by) r+ ... + (by) n
where a and b are coefficients, n is a positive integer.
The general coefficient n C r is given by
n C r = n! / [(n - r)! r!]
How to use the calculator
1 - Enter coefficients a and b and n as a positive integer then press "enter".
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