Question

when expanding a binomial using the pascal's triangle method is the exponent of the varible multiplied by the exponent of the expression?

eg. find the term containing b^8 in the expansion of (a+b^2)^12

Answer 1

Yes it is.

Answer 2

assume b^2 = c
Which will reduce your problem to finding co-efficient of c^4 in (a+c)^12