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Let's say I have complex equation

$ i \frac{dx}{dt} = i x+ (-2ig)^{1/2} $

$i$ is a complex number and $g$ is just some constant

How do I eliminate the $i$?

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    @axell don't forget to accept an answer if it answers your question! This way you mark your question for others to see as answered.2012-05-13

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Notice that $\sqrt{-2 i}=\pm(1-i)$. Hence the equation becomes $i \frac{dx}{dt} = i(x\pm \sqrt{g}) \pm \sqrt{g}$

and it becomes clear that there's no way of completely eliminating $i$ from the equation.

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    @axell in case you don't understand how to accept an answer, you do it by clicking the green "check" mark on the left of the question, next to the vote arrows.2012-05-20