Factor Completely $64 y^{4}-81$ A) $\left(64 y^{2}+1\right)\left(y^{2}-81\right)$ B) $\left(8 y^{2}-9\right)^{2}$ C) $\left(8 y^{2}+9\right)^{2}$ D) $\left(8 y^{2}+9\right)\left(8 y^{2}-9\right)$

Multiple Choice

Factor completely. If the polynomial cannot be factored, write "prime."
- $64 y^{4}-81$

A) $\left(64 y^{2}+1\right) \left(y^{2}-81\right)$
B) $\left(8 y^{2}-9\right) ^{2}$
C) $\left(8 y^{2}+9\right) ^{2}$
D) $\left(8 y^{2}+9\right) \left(8 y^{2}-9\right)$