How do you factor $x^{3} + 3 x^{2} - x - 3$ $x^3 + 3x^2 - x - 3$ ?

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How do you factor $x^{3} + 3 x^{2} - x - 3$ $x^3 + 3x^2 - x - 3$ ?

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Answer 1 · 2015-05-02T22:28:17

$f (x) = x^{3} - x + 3 x^{2} - 3 = x . (x^{2} - 1) + 3 (x^{2} - 1) = (x^{2} - 1) (x + 3)$ $f(x) = x^3 - x + 3x^2 - 3 = x.(x^2 - 1)+ 3(x^2 - 1) = (x^2 - 1)(x + 3)$

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How do you factor $x^{3} + 3 x^{2} - x - 3$ $x^3 + 3x^2 - x - 3$ ?

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