Multiply.(3p + 7q)(3p - 7q)(9p2 + 49q2)
A. 27p3 + 189p2q + 441pq2 + 343q3
B. 27p3 - 189p2q - 441pq2 + 343q3
C. 81p4 + 2401q4
D. 81p4 - 2401q4
Answer: D
Mathematics
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