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How do you factorise x squared plus 1?

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Anonymous

∙ 15y ago
Updated: 4/28/2022

(x2 + 1) = (x2 - i2) with the factors (x+i)(x-i) where i is the square root of (-1).

If you don't allow complex numbers (which is usually the case in school mathematics) then there is no factorisation.

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Wiki User

∙ 15y ago
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