Question

Who is Correct and why:-

Formula of (a+b) ³

(i) => a³-3ab (a-b) + b³


(ii) => a³+3ab (a+b) +b³



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Answer 1

The cube of sum of two terms is written in mathematical form as the cube of binomial . It is read as plus whole cube and it is used as a formula to expand cube of sum of any two terms in terms of them in mathematics. ( a + b ) 3 = a 3 + b 3 + 3 a 2 b + 3 a b 2.

Answer 2

Both Are Wrong , The correct is..

=(a+b)³=a³+3a²b+3ab²+b³

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