Expand the expression.log2 
A. 7 log2 x - 9 log2 y - log2 9
B. 7 log2 x + 9 log2 y + log2 9
C. 7 log2 x + 9 log2 y - log2 9
D. (7 log2 x)(9 log2 y) - log2 9
Answer: C
Mathematics
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A. 
B. 
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A. 
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