Answers

2015-04-13T00:56:29+05:30
(a+b)^3 = (a+b) (a+b) (a+b)
= (a^2+ab+ab+b^2) (a+b)
=(a^2+ab+ab+b^2) + b((a^2+ab+ab+b^2)
=a^3+a^b+a^b+ab^2+a^2b+ab^2+ab^2+b^3
=a^3+b^3+3a^2b+3ab^2

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2015-04-13T08:06:19+05:30
(a+b)³ = (a+b)(a+b)(a+b)
         = a²+ab+ab+b²(a+b)
         = a²+2ab+b²(a+b)
         = a³+2a²b+2ab²+b³


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