Factor the trinomial completely.6x4 + 21x3 - 12x2

A. 3x2(2x - 1)(x + 4)
B. x2(2x - 1)(3x + 12)
C. 3x(2x + 1)(x - 4)
D. (6x2 - 3)(x2 + 4)

Answer: A

Mathematics

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