Answer:
4x^2+3x+4
Step-by-step explanation:
Given (3x^2+2x+3)+(x^2+x+1)
=x^2(3+1)+x(2+1)+(3+1)
=4x^2+3x+4.
4x^2 + 3x + 4
(3x^2 + 2x + 3) + (x^2 + x + 1)
3x^2 +2x +3 + x^2 + x + 1
4x^2 + 2x + 3 + x + 1
4x^2 + 3x + 3 + 1
The answer is 4x^2 + 3x + 4.
