SOLUTION: I am not sure how to subtract this (-4 - 2x^5 + 9x^7 - 8x^6) - (x^6 + 4x^5 + 4 + 3x^7)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I am not sure how to subtract this (-4 - 2x^5 + 9x^7 - 8x^6) - (x^6 + 4x^5 + 4 + 3x^7)      Log On


   

Question 384057: I am not sure how to subtract this
(-4 - 2x^5 + 9x^7 - 8x^6) - (x^6 + 4x^5 + 4 + 3x^7)
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
%28-4+-+2x%5E5+%2B+9x%5E7+-+8x%5E6%29+-+%28x%5E6+%2B+4x%5E5+%2B+4+%2B+3x%5E7%29
...
STEP 1
remove the parenthesis
%28-4+-+2x%5E5+%2B+9x%5E7+-+8x%5E6+-+x%5E6+-+4x%5E5+-+4+-+3x%5E7%29
(Note that when you remove the parenthesis the terms are written as opposites since there is a negative sign before the parenthsis).
STEP 2
(group the similar terms with their signs starting from highest index to constant)
%289x%5E7-3x%5E7-8x%5E6-x%5E6-2x%5E5-4x%5E5-4-4%29
...
STEP 3
Add the like terms
%286x%5E7-9x%5E6-6x%5E5-8%29
...
%28highlight%286x%5E7-9x%5E6-6x%5E5-8%29%29
...
m.ananth@hotmail.ca