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Multiply
- $\left(-9 x^{5}\right)\left(5 x^{4}\right)$ A) $-45 x^{9}$ B) $14 \mathrm{x}^{9}$ C) $-45 x^{20}$

Question 147

Multiple Choice

Multiply.
- $\left(-9 x^{5}\right) \left(5 x^{4}\right)$

A) $-45 x^{9}$
B) $14 \mathrm{x}^{9}$
C) $-45 x^{20}$
D) $14 x^{20}$

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