Factor the trinomial completely.x5 + 2x4 - 15x3
A. x3(x - 5)(x + 3)
B. x3(x + 5)(x - 3)
C. (x4 + 5x3)(x - 3)
D. (x2 - 5)(x3 + 3)
Answer: B
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? 
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Fill in the blank(s) with the appropriate word(s).