Find the product.(9a + 5c)(9a - 5c)
A. 81a2 - 90ac - 25c2
B. 81a2 + 90ac - 25c2
C. 9a2 - 5c2
D. 81a2 - 25c2
Answer: D
Mathematics
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, - 
? x ? 
A. 
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