Answer
-$n^{2}$ + 14n - 10
Work Step by Step
(3n + 4) - ($n^{2}$ - 9n + 10) - (-2n + 4) =
Use the distributive property:
3n + 4 - $n^{2}$ + 9n - 10 + 2n - 4 =
Group similar terms.
-$n^{2}$ + (3n + 9n + 2n) + (4 - 10 - 4) =
Simplify.
-$n^{2}$ + 14n - 10
