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if f(x) = x3 + 4x2 - 11x - 30, then yes, (x - 3) is indeed a factor.

f(x) = x3 + 4x2 - 11x - 30

∴ f(x) = (x - 3)(x2 + 7x + 10)

∴ f(x) = (x - 3)(x + 2)(x + 5)

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Q: Is x-3 a factor of fxx3 4x2-11x-30?
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