Factor the trinomial completely.x4 - 9x3 + 14x2

A. (x2 - 2)(x2 - 7)
B. x2(x - 14)(x - 1)
C. x2(x + 2)(x + 7)
D. x2(x - 2)(x - 7)


Answer: D

Mathematics

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A. x
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Solve, using the substitution method, and check. 

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