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# Explain (a+b)^4 expansion

Asked by Megha M 5th November 2012, 6:43 PM
Binomial theorem for any positive integer n:
(a+b)n = nC0 an + nC1 an-1 b + nC2 an-2 b2 + ... + nCn-1 a bn-1 + nCn bn

Thus, we have:
(a+b)4 = 4C0 a4 + 4C1 a3 b + 4C2 a2 b2 + 4C3 a b3 + 4C4 b4
Now, you can simplify this easily.
Answered by Expert 7th November 2012, 10:05 AM
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