Perform the indicated operations.
-$$\left( 5 x ^ { 8 } - 4 x ^ { 7 } + 2 x ^ { 6 } + 8 \right) + \left( 7 x ^ { 8 } + 6 x ^ { 7 } + 3 x ^ { 6 } + 4 \right)$$
A) $19 ^{ 42} + 12$
B) $x ^ { 8 } + 14 x ^ { 7 } + 9 x ^ { 6 } + 3$
C) $12 x^{16} + 2 x ^{14 }+ 5 x ^ { 12 } + 12$
D) $12 x ^ { 8 } + 2 x ^ { 7 } + 5 x ^ { 6 } + 12$

Question

Quizplus · Accepted Answer

To solve, add the coefficients of like terms: $5x^8 + 7x^8 = 12x^8$, $-4x^7 + 6x^7 = 2x^7$, $2x^6 + 3x^6 = 5x^6$, and $8 + 4 = 12$.

Perform the Indicated Operations (5x8−4x7+2x6+8)+(7x8+6x7+3x6+4)\left( 5 x ^ { 8 } - 4 x ^ { 7 } + 2 x ^ { 6 } + 8 \right) + \left( 7 x ^ { 8 } + 6 x ^ { 7 } + 3 x ^ { 6 } + 4 \right)(5x8−4x7+2x6+8)+(7x8+6x7+3x6+4)

Perform the Indicated Operations $\left( 5 x ^ { 8 } - 4 x ^ { 7 } + 2 x ^ { 6 } + 8 \right) + \left( 7 x ^ { 8 } + 6 x ^ { 7 } + 3 x ^ { 6 } + 4 \right)$