Factor completely. If the polynomial cannot be factored, write prime.u2 - 10u + 21

A. (u - 7)(u + 3)
B. (u - 7)(u - 3)
C. (u + 7)(u - 3)
D. (u + 7)(u + 3)


Answer: B

Mathematics

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Solve and check. = 7 - 

A. = 8 
B. = 
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