Factor by grouping.x3 - 4x2 - 7x + 28
A. (x + 4)(x3 - 7)
B. (x - 4)(x2 + 7x)
C. (x + 4)(x2 + 7)
D. (x - 4)(x2 - 7)
Answer: D
Mathematics
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A. -1
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C. 
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Mathematics