Factor Completely $8 x^{3}-216 y^{3}$ A) $8(x-3 y)\left(x^{2}+9 y^{2}\right)$ B) $8(x-3 y)\left(x^{2}+3 x y+9 y^{2}\right)$

Multiple Choice

Factor completely. If the polynomial cannot be factored, write "prime."
- $8 x^{3}-216 y^{3}$

A) $8(x-3 y) \left(x^{2}+9 y^{2}\right)$
B) $8(x-3 y) \left(x^{2}+3 x y+9 y^{2}\right)$
C) $8(x+3 y) \left(x^{2}-3 x y+9 y^{2}\right)$
D) $(8 x-3 y) \left(x^{2}+3 y+72 y^{2}\right)$