(3a2 + 2ab + 2b) + (5a2 − 3ab + 9)
3a^2 + 2ab + 2b + 5a^2 - 3ab + 9combine like terms8a^2 -ab + 2b + 9
(3a2 + 2ab + 2b) + (5a2 - 3ab+9)8a2 - 1ab + 2b + 9