Q8 of 70 Page 371

Using binomial theorem, expand each of the following:


To find: Expansion of


Formula used: (i)


(ii) (a+b)n =   nC0an + nC1an-1b + nC2an-2b2 + …… +nCn-1abn-1 + nCnbn


We have,


We can write as and as


Now, we have to solve for






Ans) + 8 + 28 + 56 + 70+ 56+ 28(x)1(y)3 + 8 + (y)4


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