Factorizing

Code:

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f(x) = x^3 - 3x^2 - 18x - 40

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The answer comes to f (x) = (x + 5)(x + 2)(x - 4)

Can someone please explain how this was obtained?

Quote:

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Originally Posted by studentme

Code:

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f(x) = x^3-3x^2-18x - 40

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The answer comes to f (x) = (x + 5)(x + 2)(x - 4)

Can someone please explain how this was obtained?

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if that is the question then the answer is wrong, or your input is wrong see: