Answer:
3x2+2x+2
Explanation:
(2x2+3x+4)+(x2-x-2)
2x2+3x+4+x2-x-2
Like terms
1) numbers without variables: +4 and -2
2) numbers with a single x variable: +3x and -x
3) numbers with a x2 variable: +2x2 and +x2
Combine like terms
1) +4-2=2
2) +3x-x=2x
3) +2x2+x2=3x2
Add the combined terms together to get your answer
3x2+2x+2