MathGroup Archive 2006

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a fault in the Factor[] function for polynomials?


Expand[(x^4 + 2*Sqrt[3]x^2 - 1)(x^4 - 2*Sqrt[3]x^2 - 1)]
1 - 14x^4 + x^8
Factor[%]
(1 - 4x^2 + x^4)(1 + 4x^2 + x^4)


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