Multiply.
-$7 x ^ { 2 } \left( - 12 x ^ { 7 } - 7 x ^ { 4 } - 9 \right)$
A) $- 84 x ^ { 9 } - 7 x ^ { 4 } - 9$
B) $- 84 x ^ { 9 } - 49 x ^ { 6 } - 63 x ^ { 2 }$
C) $- 84 x ^ { 7 } - 49 x ^ { 4 } - 63$
D) $- 84 x ^ { 9 } - 49 x ^ { 6 }$

Question

Quizplus · Accepted Answer

When multiplying $7x^2$ by each term inside the parentheses, you apply the distributive property and multiply the coefficients together and add the exponents for the variables. This results in $-84x^{9} - 49x^{6} - 63x^{2}$.

Multiply - 7x2(−12x7−7x4−9)7 x ^ { 2 } \left( - 12 x ^ { 7 } - 7 x ^ { 4 } - 9 \right)7x2(−12x7−7x4−9)

Multiply
- $7 x ^ { 2 } \left( - 12 x ^ { 7 } - 7 x ^ { 4 } - 9 \right)$