Posted by **Adriana** on Thursday, June 7, 2012 at 11:56am.

(7ab+4a2b4)+(a2b4-7ab)

The 2 and 4 are on top of the a and b. (sqare #)

- Math add the polynomials -
**MathMate**, Thursday, June 7, 2012 at 12:09pm
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**, Thursday, June 7, 2012 at 12:20pm
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**, Thursday, June 7, 2012 at 12:22pm
yes 7 a b - 7 a b = 0

and the answer is

5 a^2 b^4

- To Adriana: -
**MathMate**, Thursday, June 7, 2012 at 12:46pm
Your answer is correct.

- Math add the polynomials -
**Adriana**, Thursday, June 7, 2012 at 12:49pm
so its 4a^2b^8?

- Math add the polynomials -
**MathMate**, Thursday, June 7, 2012 at 1:08pm
I mean this is correct:

"ahh so the 7ab cancels because of the -7ab so answer is 5a²b4."

- Math add the polynomials -
**Henry**, Friday, June 8, 2012 at 6:53pm
Post it.

- Math add the polynomials -
**MathMate**, Friday, June 8, 2012 at 7:47pm
"...so answer is 5a²b4"

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