Posted by Adriana on .
(7ab+4a2b4)+(a2b47ab)
The 2 and 4 are on top of the a and b. (sqare #)

Math add the polynomials 
MathMate,
You need to find the like terms, for example, a²b^{4} and 4a²b^{4} are like terms.
You can add them together to make 5a²b^{4}.
So
a²b^{4}+4a²b^{4}=5a²b^{4}
Like terms must have the same variables each raised to the same power. We can add like terms by adding the coefficients, as we did above. 
Math add the polynomials 
Adriana,
ahh so the 7ab cancels because of the 7ab so answer is 5a²b4. I thought it was 4a4b8
Thank you 
Math add the polynomials 
Damon,
yes 7 a b  7 a b = 0
and the answer is
5 a^2 b^4 
To Adriana: 
MathMate,
Your answer is correct.

Math add the polynomials 
Adriana,
so its 4a^2b^8?

Math add the polynomials 
MathMate,
I mean this is correct:
"ahh so the 7ab cancels because of the 7ab so answer is 5a²b4." 
Math add the polynomials 
Henry,
Post it.

Math add the polynomials 
MathMate,
"...so answer is 5a²b4"