Collect like terms and then arrange in descending order.
-$-3 x^{9}-9 x^{5}+8 x^{6}+10 x^{9}-13 x^{6}$
A) $7 x^{9}-5 x^{6}-9 x^{5}$
B) $420 x$
C) $21 x^{20}$
D) Can't be simplified

Question

Quizplus · Accepted Answer

First, combine like terms: $-3x^9 + 10x^9 = 7x^9$ and $8x^6 - 13x^6 = -5x^6$. The term $-9x^5$ has no like terms, so it remains as is. The final expression in descending order is $7x^9 - 5x^6 - 9x^5$.

Collect Like Terms and Then Arrange in Descending Order −3x9−9x5+8x6+10x9−13x6-3 x^{9}-9 x^{5}+8 x^{6}+10 x^{9}-13 x^{6}−3x9−9x5+8x6+10x9−13x6

Collect Like Terms and Then Arrange in Descending Order $-3 x^{9}-9 x^{5}+8 x^{6}+10 x^{9}-13 x^{6}$