# please check if I answered correctly

• October 21st 2008, 09:45 AM
mathdummy22
(2+4x+9x^2+3x^3)+(1-4x+9x^5-3x^3) =

i got 3+81x^4, is that right?
• October 21st 2008, 09:48 AM
masters
Quote:

Originally Posted by mathdummy22
(2+4x+9x^2+3x^3)+(1-4x+9x^5-3x^3) =

i got 3+81x^4, is that right?

You can only combine 'like' terms. Like terms are terms that have the same variable and exponent.

Answer should be $3+9x^2+9x^5$