SOLUTION: {{{(6x^2+2x-8)-(3x^2-x-1)}}} i dont understand how you are suppose to work that can you show me step by step please? i tried it and this is what i got {{{3x^2+3x-9}}}

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: {{{(6x^2+2x-8)-(3x^2-x-1)}}} i dont understand how you are suppose to work that can you show me step by step please? i tried it and this is what i got {{{3x^2+3x-9}}}      Log On


   

Question 14392: %286x%5E2%2B2x-8%29-%283x%5E2-x-1%29
i dont understand how you are suppose to work that can you show me step by step please?
i tried it and this is what i got
3x%5E2%2B3x-9
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
%286x%5E2%2B2x-8%29-%283x%5E2-x-1%29
You were very close.
Don't forget outside the second set of parenthesis is a -1, it needs to be distributed;
-1%283x%5E2%29
-1%28-x%29
-1%28-1%29
so you end with:
6x%5E2%2B2x-8-3x%5E2%2Bx%2B1
Add all like terms(which you did)
6x%5E2-3x%5E2%2B2x%2Bx-8%2B1
3x%5E2%2B3x-7
Looks like when you distributed that -1 you forgot to change the -1 in the parenthesis to a positive. Remember two negatives multiplied together, give you a positive.
Hope you understand
=)