Find the linear factorization of the polynomial and find all roots of the polynomial. f(x) = x3 + 6x2 + 7x + 42

A. f(x) = (x + 6i)(x + )2, roots: -6i, ± 
B. f(x) = (x + 6)(x + i)2, roots: -6, ± i
C. f(x) = (x + 1)(x + i)(x - i), roots: -1, ± i
D. f(x) = (x + 6)(x + i)(x - i), roots: -6, ± i


Answer: D

Mathematics

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A. - 
B.
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A. ?
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