Simplify the exponential expression.
-$\left( - 4 x ^ { 4 } \right) \left( 4 x ^ { 5 } \right)$
A) $16 x ^ { 20}$
B) $- 16 x ^ { 20 }$
C)- $- 16 x ^ { 9 }$
D) $16 x ^ { 9 }$

Question

Quizplus · Accepted Answer

When multiplying exponential expressions with the same base, you add the exponents. Here, $(-4) \times (4) = -16$ and $x^4 \times x^5 = x^{4+5} = x^9$, so the correct answer is $-16x^9$.

Simplify the Exponential Expression (−4x4)(4x5)\left( - 4 x ^ { 4 } \right) \left( 4 x ^ { 5 } \right)(−4x4)(4x5)

Simplify the Exponential Expression $\left( - 4 x ^ { 4 } \right) \left( 4 x ^ { 5 } \right)$