Multiply. Assume that all variables represent natural numbers.
-$- 9 k ^ { r + 1 } \left( 7 k ^ { r + 4 } - 4 k ^ { r + 3 } - 6 k \right)$
A) $- 63 k ^ { r + 5 } + 36 k ^ { r + 4 } + 54 k ^ { r + 1 }$
B) $- 63 k ^ { r + 5 }+ 36 k ^ { r + 4 } + 54 k ^ { r + 2}$
C) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 1 }$
D) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 2 }$

Question

Multiply. Assume that all variables represent natural numbers.
-$- 9 k ^ { r + 1 } \left( 7 k ^ { r + 4 } - 4 k ^ { r + 3 } - 6 k \right)$
A) $- 63 k ^ { r + 5 } + 36 k ^ { r + 4 } + 54 k ^ { r + 1 }$
B) $- 63 k ^ { r  + 5 }+ 36 k ^ { r + 4 } + 54 k ^ { r + 2}$
C) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 1 }$
D) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 2 }$

Quizplus · Accepted Answer

The Answer of Multiply. Assume that all variables represent natural numbers.
-$- 9 k ^ { r + 1 } \left( 7 k ^ { r + 4 } - 4 k ^ { r + 3 } - 6 k \right)$
A) $- 63 k ^ { r + 5 } + 36 k ^ { r + 4 } + 54 k ^ { r + 1 }$
B) $- 63 k ^ { r  + 5 }+ 36 k ^ { r + 4 } + 54 k ^ { r + 2}$
C) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 1 }$
D) $- 63 k ^ { 2 r + 5 } + 36 k ^ { 2 r + 4 } + 54 k ^ { r + 2 }$

Multiply Assume That All Variables Represent Natural Numbers −9kr+1(7kr+4−4kr+3−6k)- 9 k ^ { r + 1 } \left( 7 k ^ { r + 4 } - 4 k ^ { r + 3 } - 6 k \right)−9kr+1(7kr+4−4kr+3−6k)

Multiply Assume That All Variables Represent Natural Numbers $- 9 k ^ { r + 1 } \left( 7 k ^ { r + 4 } - 4 k ^ { r + 3 } - 6 k \right)$