Solved

Multiply
- $\left(3 x^{2}-7 x\right)\left(3 x^{2}+7 x\right)$ A) $9 x^{4}-42 x^{3}-49 x^{2}$

Question 162

Multiple Choice

Multiply.
- $\left(3 x^{2}-7 x\right) \left(3 x^{2}+7 x\right)$

A) $9 x^{4}-42 x^{3}-49 x^{2}$
B) $9 x^{4}-49 x^{2}$
C) $9 x^{4}+42 x^{3}-49 x^{2}$
D) $3 x^{4}-7 x^{2}$

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