Factor completely. If the polynomial is prime, state so.7r3 - 189
A. 7(r - 3)(r2 - 3r + 9)
B. 7(r - 21)(r2 + 21r + 63)
C. 7(r - 3)(r2 + 3r + 9)
D. 7(r + 3)(r2 - 3r + 9)
Answer: C
Mathematics
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A. -i
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