Question

Question:

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??

Answer 1

see other question.

Answer 2

1342,$

Answer 3

How do you work out the first part of the quarter

Answer 4

*Question