Perform the indicated operation.
-$\left( 9 x ^ { 3 } + 9 x ^ { 2 } + 4 x + 6 \right) + \left( 4 x ^ { 3 } + 2 x + 8 \right)$
A) $13 x ^ { 3 } + 9 x ^ { 2 } + 6 x + 14$
B) $13 x ^ { 3 } + 11 x ^ { 2 } + 8 x + 6$
C) $4 x ^ { 3 } + 11 x ^ { 2 } + 12 x + 6$
D) $13 x ^ { 3 } + 6 x + 14$

Question

Quizplus · Accepted Answer

To add the polynomials, combine like terms: $9x^3 + 4x^3 = 13x^3$, $9x^2$, $4x + 2x = 6x$, and $6 + 8 = 14$.

Perform the Indicated Operation (9x3+9x2+4x+6)+(4x3+2x+8)\left( 9 x ^ { 3 } + 9 x ^ { 2 } + 4 x + 6 \right) + \left( 4 x ^ { 3 } + 2 x + 8 \right)(9x3+9x2+4x+6)+(4x3+2x+8)

Perform the Indicated Operation $\left( 9 x ^ { 3 } + 9 x ^ { 2 } + 4 x + 6 \right) + \left( 4 x ^ { 3 } + 2 x + 8 \right)$