same type of binomial theorem question
posted by nicholas .
Find the first 3 terms in the expansion, in ascending powers of x, of
(2 + x)^6. Hence, obtain the coefficient of x^2 in the expansion of
(2 + x - x^2)^6
I know the first part of the question, and the first 3 terms are
(64 + 192x + 240x^2 + ...)
How do i use this answer in the second part??
see other question.