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) $14 x^{20}$

Name: 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) $14 x^{20}$
Brand: Quizplus
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Question

Quizplus · Accepted Answer

When multiplying powers with the same base, you add the exponents. So, $(-9) \times (5) = -45$ and $x^5 \times x^4 = x^{5+4} = x^9$, resulting in $-45 x^9$.

Multiply - (−9x5)(5x4)\left(-9 x^{5}\right)\left(5 x^{4}\right)(−9x5)(5x4) A) −45x9-45 x^{9}−45x9 B) 14x914 \mathrm{x}^{9}14x9 C) −45x20-45 x^{20}−45x20

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