Multiply.
-$- 5 x ^ { 5 } y ^ { 3 } \cdot 9 x ^ { 8 } y$
A) $4 x ^ { 13 } y ^ { 4 }$
B) $- 45 x ^ { 13 } y ^ { 4 }$
C) $4 x ^ { 40 } y ^ { 3 }$
D) $- 45 \mathrm { x } ^{13} \mathrm { y }^ 3$

Question

Quizplus · Accepted Answer

To multiply two terms with the same base, we add their exponents. In this case, the base is both x and y. For x, we add 5 and 8 to get 13. For y, we add 3 and 1 to get 4. Then we multiply the coefficients (-5 and 9) to get -45. So the final answer is $- 45 x ^ { 13 } y ^ { 4 }$.

Multiply - −5x5y3⋅9x8y- 5 x ^ { 5 } y ^ { 3 } \cdot 9 x ^ { 8 } y−5x5y3⋅9x8y

Multiply
- $- 5 x ^ { 5 } y ^ { 3 } \cdot 9 x ^ { 8 } y$