Multiply Mentally
- $\left(4 x^{2}+7\right)\left(x^{2}+4\right)$ A) $4 x^{4}+23 x^{2}+28$ B) $4 x^{3}+16 x^{2}+7 x+28$

Multiple Choice

Multiply mentally
- $\left(4 x^{2}+7\right) \left(x^{2}+4\right)$

A) $4 x^{4}+23 x^{2}+28$
B) $4 x^{3}+16 x^{2}+7 x+28$
C) $4 x^{2}+22 x+28$
D) $4 x^{2}+23 x+28$