Use the sum-to-product formulas to rewrite the sum or difference as a product.
?

?

A. ?
B. ?
C. ??
D. ?
E. ?


Answer: C

Mathematics

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A.

B.

C.

D.

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A.  + 
B.  + 
C.  +  + 
D.  + 

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A. {-2}
B. {8}
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A. {-1} B. {1} C. ? D. {3}

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