Question

The coefficient of x^8 in the expansion of
(x^2 - 3)^7

Answer 1

http://www.wolframalpha.com/input/?i=expand+%28x^2+-+3%29^7

Answer 2

this is binomial expansion

Answer 3

wow it is indeed, and sorry i haven't learn it b4 so I do not know how to do it.

Answer 4

k, i found a good website that you can read. please look at it.
http://www.purplemath.com/modules/binomial.htm

Answer 5

= 7C3

Answer 6

=35 x^8

Answer 7

is -945 when u expand it you need to go the x^a term and see what is the number o variable in there

Answer 8

Oops, really sorry of overlook b term,
Yep 35 * ( - 27 ) = -945.