.
= + + + + + + =
= + + + + + + .
On binomial expansion and binomial coefficients see the lessons
- Binomial Theorem, Binomial Formula, Binomial Coefficients and Binomial Expansion
- Remarkable identities for Binomial Coefficients
- The Pascal's triangle
in this site.
Also, you have this free of charge online textbook in ALGEBRA-II in this site
- ALGEBRA-II - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this textbook under the topic
"Binomial expansion, binomial coefficients, Pascal's triangle".