Multiply.
-$$- 9 x ^ { 5 } \cdot 7 x ^ { 7 } \cdot 2 x ^ { 5 }$$
A) $126 x ^ { 175 }$
B) $126 x^{ 17}$
C) $- 126 x ^ { 175 }$
D) $- 126 \mathrm { x } ^ { 17 }$

Question

Quizplus · Accepted Answer

When multiplying terms with the same base, you add the exponents. Thus, $x^5 \cdot x^7 \cdot x^5 = x^{5+7+5} = x^{17}$. The coefficients multiply to $-9 \cdot 7 \cdot 2 = -126$, making the answer $-126x^{17}$.

Multiply - −9x5⋅7x7⋅2x5- 9 x ^ { 5 } \cdot 7 x ^ { 7 } \cdot 2 x ^ { 5 }−9x5⋅7x7⋅2x5

Multiply
- $- 9 x ^ { 5 } \cdot 7 x ^ { 7 } \cdot 2 x ^ { 5 }$