SOLUTION: Subtract: (4x3 - 9x + 15) - (-2x3 + 4x2 + 7x). Give answer with only positive exponents. Assume x and y are not equal to 0.

Algebra ->  Linear-equations -> SOLUTION: Subtract: (4x3 - 9x + 15) - (-2x3 + 4x2 + 7x). Give answer with only positive exponents. Assume x and y are not equal to 0.       Log On


   

Question 4206: Subtract: (4x3 - 9x + 15) - (-2x3 + 4x2 + 7x).
Give answer with only positive exponents.
Assume x and y are not equal to 0.
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
Remove the parentheses, remembering that a negative of a negative is a positive.
%284x%5E3++-+9x+%2B+15%29+-+%28-2x%5E3+%2B++4x%5E2+%2B+7x%29
4x%5E3++-+9x+%2B+15+%2B+2x%5E3+-++4x%5E2+-+7x

Combine like terms:
6x%5E3++-+4x%5E2+-+16x+%2B+15

By the way, what is this about "Give answer with only positive exponents." If the problem is copied correctly how could it be anything else?

R^2 at SCC