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Add or Subtract (r39rs+7s2)(9r3+rs3s2)\left( r ^ { 3 } - 9 r s + 7 s ^ { 2 } \right) - \left( 9 r ^ { 3 } + r s - 3 s ^ { 2 } \right)

Question 34

Multiple Choice

Add or subtract.
- (r39rs+7s2) (9r3+rs3s2) \left( r ^ { 3 } - 9 r s + 7 s ^ { 2 } \right) - \left( 9 r ^ { 3 } + r s - 3 s ^ { 2 } \right)


A) 8r310rs+4s2- 8 r ^ { 3 } - 10 r s + 4 s ^ { 2 }
B) 9r39rs+4s2- 9 r ^ { 3 } - 9 r s + 4 s ^ { 2 }
C) 8r38rs+10s2- 8 r ^ { 3 } - 8 r s + 10 s ^ { 2 }
D) 8r310rs+10s2- 8 r ^ { 3 } - 10 r s + 10 s ^ { 2 }

Correct Answer:

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