Factor.
-$15 z ^ { 4 } - 8 z ^ { 2 } - 16$
A) $\left( 5 z ^ { 2 } + 4 \right) \left( 3 z ^ { 2 } - 4 \right)$
B) $\left( 5 z ^ { 4 } + 4 \right) ( 3 z - 4 )$
C) $\left( 3 z ^ { 4 } + 4 \right) ( 5 z - 4 )$
D) $\left( 3 z ^ { 2 } + 4 \right) \left( 5 z ^ { 2 } - 4 \right)$

Question

Quizplus · Accepted Answer

The polynomial $15z^4 - 8z^2 - 16$ can be factored by grouping terms and finding common factors. The correct factorization is $\left( 5 z ^ { 2 } + 4 \right) \left( 3 z ^ { 2 } - 4 \right)$, which matches choice A.

Factor - 15z4−8z2−1615 z ^ { 4 } - 8 z ^ { 2 } - 1615z4−8z2−16

Factor
- $15 z ^ { 4 } - 8 z ^ { 2 } - 16$