Factor.
-$10 x ^ { 4 } - 21 x ^ { 3 } + 9 x ^ { 2 }$
A) $\left( 10 x ^ { 2 } + 3 \right) \left( x ^ { 2 } + 3 \right)$
B) $x ( 2 x + 3 ) ( 5 x + 3 )$
C) $x ^ { 2 } ( 2 x - 3 ) ( 5 x - 3 )$
D) $x ^ { 2 } ( 10 x - 1 ) ( x - 9 )$

Question

Quizplus · Accepted Answer

First, factor out the greatest common factor, which is $x^2$, resulting in $x^2(10x^2 - 21x + 9)$. Then, factor the quadratic inside the parentheses to get $x^2(2x - 3)(5x - 3)$.

Factor - 10x4−21x3+9x210 x ^ { 4 } - 21 x ^ { 3 } + 9 x ^ { 2 }10x4−21x3+9x2

Factor
- $10 x ^ { 4 } - 21 x ^ { 3 } + 9 x ^ { 2 }$