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There is no general solution for `ninNN.`

For `n=0:`  



Which is valid for all real numbers hence `x inRR.`

For `n=1:`




Which is never true hence there is no solution.

For `n=2:`


`x^2+2x i-1-(x^2-2x i-1)=0`

`4x i=0`


Obviously I could go on like this forever. E.g. for `n=3` solutions are `x_(1,2)=pm1/sqrt3.` But the point is that there are no general solution when `n` is an integer (or even worse a real number). Another way to prove this is to use de Moivre's formula. 

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