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Popular >

factor x^3-2x-21

Solution

factor

x^{3} - 2 x - 21

Solution

(x - 3) (x^{2} + 3 x + 7)

Solution steps

x^{3} - 2 x - 21

Use the rational root theorem

= (x - 3) \frac{x ^{3} - 2 x - 21}{x - 3}

\frac{x ^{3} - 2 x - 21}{x - 3} = x^{2} + 3 x + 7

= (x - 3) (x^{2} + 3 x + 7)

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Frequently Asked Questions (FAQ)

What is factor x^3-2x-21 ?
The solution to factor x^3-2x-21 is (x-3)(x^2+3x+7)