Factor using the ac-method.
-$$9 x ^ { 4 } + 24 x ^ { 2 } + 16$$
A) $\left( 3 x ^ { 2 } + 1 \right) \left( 3 x ^ { 2 } + 16 \right)$
B) $\left( 3 x ^ { 2 } + 4 \right) \left( 3 x ^ { 2 } + 4 \right)$
C) $\left( 9 x ^ { 2 } + 4 \right) \left( x ^ { 2 } + 4 \right)$
D) $\left( 3 x ^ { 2 } - 4 \right) \left( 3 x ^ { 2 } - 4 \right)$

Question

Quizplus · Accepted Answer

The given expression is a perfect square trinomial, factoring to $(3x^2 + 4)^2$, which matches option B.

Factor Using the Ac-Method 9x4+24x2+169 x ^ { 4 } + 24 x ^ { 2 } + 169x4+24x2+16

Factor Using the Ac-Method $9 x ^ { 4 } + 24 x ^ { 2 } + 16$