Binomial Theorem problem!
Doing homework, and came across this question. I cannot for the life of me figure out what I am doing wrong, but it doesn't match up to the answer at the back of the book. It does on wolfram alpha. So am I doing this correctly?
Find the first five terms in the expansion of each of the following:
My attempted answer: ***I do not know how to show combinations using Latex, so hopefully this makes sense. Example: is "8 choose 0"***
Answer at back of book:
Wolfram alpha: http://www.wolframalpha.com/input/?i=%282a+%2B+%283a^%28-2%29%29%29^8