Factor the polynomial completely.21p2q2 - 27pq3 + 21p4q5
A. 3pq2(7p - 9q + 7p3q3)
B. 3p2q2(7 - 9q + 7p2q3)
C. 3pq2(7p - 27q + 21p3q3)
D. 3pq(7pq - 9q2 + 7p3q4)
Answer: A
Mathematics
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and 
in trigonometric form and then find their quotient.
?
?
?
A. ?
B. ?
C. ?
D. 
E. ?
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