Question

simplify the following
1.(9r³ +5r² + 11 r) + ( -2r³ + 9r -8r²)
2.(-9v²-84) + (-2uv-2u²+v²)+(-v²+4uv)​

Answer 1

Answer:

1.

$7 {r}^{3} - 3 {r}^{2} + 20$

2.

$- 9 {v}^{2} - 2 {u}^{2} + 4uv - 84$