Factor the polynomial completely.45a2b + 30ab - 15b
A. 5b(9a - 3)(a + 1)
B. 5b(9a + 3)(a - 1)
C. 5(9ab + 3)(ab - 1)
D. 5(9ab - 3)(ab + 1)
Answer: A
Mathematics
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A. - 
B. - 
C. - 
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