SOLUTION: I have tried to figure these problems out can someone please help me Thanks. (5a^3 - 4a^2) + (4a^3 + 9a^2)

Algebra ->  Expressions -> SOLUTION: I have tried to figure these problems out can someone please help me Thanks. (5a^3 - 4a^2) + (4a^3 + 9a^2)       Log On


   

Question 330214: I have tried to figure these problems out can someone please help me Thanks.
(5a^3 - 4a^2) + (4a^3 + 9a^2)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Gather like terms,

%285a%5E3+-+4a%5E2%29+%2B+%284a%5E3+%2B+9a%5E2%29+=9a%5E3+%2B+5a%5E2