I'm sorry, but when you did the copy-n-paste from your online exam (at "exams.next.ecollege.com"), the images do not appear to have copied over.
To learn how to use the Binomial Theorem (which they were supposed to have covered in the book and in class, before giving you a test on it), try some online lessons.
Once you have learned the basic terms and techniques, please attempt at least one of the exercises. If you get stuck, you will then be able to reply with a clear listing of your work and reasoning so far.
Thank you!
The first 13 lines of the first link of the google search(given by Stapel) result makes it a cake walk.
Were you sincere enough to read the links (s)he provided