Wolfram|Alpha

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Input interpretation:

factor | x^3 + 2 x^2 + x + 2


Result:

(x + 2) (x^2 + 1)


Irreducible factorization:

(x - i) (x + i) (x + 2)


Factorizations over finite fields:

GF(2) | x (x + 1)^2

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