SOLUTION: Subtract (3a^3+3b^3)-(7a^3+5a^2b-5ab^2+3b^3) I am not getting the hang of these yet.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Subtract (3a^3+3b^3)-(7a^3+5a^2b-5ab^2+3b^3) I am not getting the hang of these yet.      Log On


   

Question 323757: Subtract
(3a^3+3b^3)-(7a^3+5a^2b-5ab^2+3b^3)

I am not getting the hang of these yet.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%283a%5E3%2B3b%5E3%29-%287a%5E3%2B5a%5E2b-5ab%5E2%2B3b%5E3%29 Start with the given expression.


3a%5E3%2B3b%5E3-7a%5E3-5a%5E2b%2B5ab%5E2-3b%5E3 Distribute.


%283a%5E3-7a%5E3%29%2B%283b%5E3-3b%5E3%29-5a%5E2b%2B5ab%5E2 Group like terms.


-4a%5E3-5a%5E2b%2B5ab%5E2 Combine like terms.


So %283a%5E3%2B3b%5E3%29-%287a%5E3%2B5a%5E2b-5ab%5E2%2B3b%5E3%29=-4a%5E3-5a%5E2b%2B5ab%5E2