Question

For the expansion (x-y)^7 Find the indicated term

Answer 1

You can get the answer using the Binomial theorem: http://en.wikipedia.org/wiki/Binomial_theorem

If you have any specific questions after reading this, feel free to ask.

Answer 2

i dont understand it

Answer 3

The fastest way to solve this is the Pascal Triangle Method.

Answer 4

Click on his link and scroll down to examples. Look at the x^7 one the example is your answer, just change your signs after every other term to negative.