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