SOLUTION: I need help finding the first three(3) terms of the expansion (a-b)^10. I have something that does not seem to make sense. I have a^10 + 10a^9 (-b), or a^10 -10a^9b + 45a^8b^2.

Algebra ->  Sequences-and-series -> SOLUTION: I need help finding the first three(3) terms of the expansion (a-b)^10. I have something that does not seem to make sense. I have a^10 + 10a^9 (-b), or a^10 -10a^9b + 45a^8b^2.       Log On


   

Question 117027This question is from textbook
: I need help finding the first three(3) terms of the expansion (a-b)^10.
I have something that does not seem to make sense. I have a^10 + 10a^9 (-b), or a^10 -10a^9b + 45a^8b^2. I am not even sure how I got this or even if it is right. Please help me, again the problem is (a-b)^10 Thanks so much This question is from textbook

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
a^10 -10a^9b + 45a^8b^2 is correct

you could have gotten there using Pascal's Triangle or nCr (combinations)