Factor.x3 - 343
A. (x + 343)(x2 - 1)
B. (x + 7)(x2 - 7x + 49)
C. (x - 7)(x2 + 49)
D. (x - 7)(x2 + 7x + 49)
Answer: D
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A. (-?, -1] ?
B. 
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A. ?
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