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

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. 
ahh so the 7ab cancels because of the 7ab so answer is 5a²b4. I thought it was 4a4b8
Thank you 
yes 7 a b  7 a b = 0
and the answer is
5 a^2 b^4 
Your answer is correct.

so its 4a^2b^8?

I mean this is correct:
"ahh so the 7ab cancels because of the 7ab so answer is 5a²b4." 
Post it.

"...so answer is 5a²b4"