Find the sum or difference.
-$$\left( 2 n ^ { 7 } - 9 n - 7 n ^ { 6 } \right) + \left( - 4 n ^ { 6 } + 5 n ^ { 7 } - 6 n \right)$$
A) $7 n - 11 n ^ { 7 } - 15 n ^ { 6 }$
B) $- 19 n ^{14}$
C) $- 4 n ^ { 7 } - 2 n ^ { 6 } - 13 n$
D) $7 n ^ { 7 } - 11 n ^ { 6 } - 15 n$

Question

Quizplus · Accepted Answer

To find the sum, combine like terms: $2n^7 + 5n^7 = 7n^7$, $-7n^6 - 4n^6 = -11n^6$, and $-9n - 6n = -15n$.

Find the Sum or Difference (2n7−9n−7n6)+(−4n6+5n7−6n)\left( 2 n ^ { 7 } - 9 n - 7 n ^ { 6 } \right) + \left( - 4 n ^ { 6 } + 5 n ^ { 7 } - 6 n \right)(2n7−9n−7n6)+(−4n6+5n7−6n)

Find the Sum or Difference $\left( 2 n ^ { 7 } - 9 n - 7 n ^ { 6 } \right) + \left( - 4 n ^ { 6 } + 5 n ^ { 7 } - 6 n \right)$