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Basic operations, simple factors, factor Theorem, Remainder Theorem, Division of polynomials.

Let f(x) = x3 - 6x2 + 11x - 6.
Then, which one of the folllowing is not a factor of f(x) ? 

Option:
A. x - 1
B. x - 2
C. x + 3
D. x - 3
Answer: C . x + 3

Justification:

Since x = -3 does not make (x3 - 6x2 + 11x - 6) zero,
so (x + 3) is not a factor.

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