Answer
5$n^{2}$ + 2n + 3
Work Step by Step
We write the expression to express this addition problem:
(3$n^{2}$ - n + 7) - (-2$n^{2}$ - 3n + 4) =
Remove parantheses.
3$n^{2}$ - n + 7 + 2$n^{2}$ + 3n - 4 =
Group similar terms.
(3$n^{2}$ +2$n^{2}$) + (3n - n) + (7 - 4) =
Simplify.
5$n^{2}$ + 2n + 3
