SOLUTION: Subtract. 3x^4 + 4x^3 + 7 - (x^4 - 2x^3 - x^2 - 9x) ___________ ________ Very confused here, thank you

Algebra ->  Equations -> SOLUTION: Subtract. 3x^4 + 4x^3 + 7 - (x^4 - 2x^3 - x^2 - 9x) ___________ ________ Very confused here, thank you      Log On


   

Question 238988: Subtract.
3x^4 + 4x^3 + 7
- (x^4 - 2x^3 - x^2 - 9x)
____________________
Very confused here, thank you
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Subtract:
3x%5E4%2B4x%5E3%2B7-%28x%5E4-2x%5E3-x%5E2-9x%29 It would be helpful to group the like-terms together but first, remove the parentheses and be sure to change the sign of each term inside the parentheses:
3x%5E4%2B4x%5E3%2B7-x%5E4%2B2x%5E3%2Bx%5E2%2B9x Now group the like-terms.
%283x%5E4-x%5E4%29%2B%284x%5E3%2B2x%5E3%29%2Bx%5E2%2B9x%2B7 Now add or subtract the terms as indicated:
%282x%5E4%29%2B%286x%5E3%29%2Bx%5E2%2B9x%2B7
The solution is:
highlight%282x%5E4%2B6x%5E3%2Bx%5E2%2B9x%2B7%29