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Find whether polynomial g(x) is a factor of polynomial f(x) or, not:

f(x) = x5 + 3x4 -x3 -3x2 +5x +15, g(x) = x+3

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We have f(x) = x5 + 3x4 -x3 -3x2 +5x +15 and g(x) = x+3

In order to find whether g(x) = x - (-3) is a factor of f(x) or not, it is sufficient to prove that f(-3) = 0

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