Possible Duplicate:
How to find the root of $x^4 +1$
What algorithms can be used for finding all roots of the given polynomial:
\begin{equation} x^4 + 1 = 0 \end{equation}
Possible Duplicate:
How to find the root of $x^4 +1$
What algorithms can be used for finding all roots of the given polynomial:
\begin{equation} x^4 + 1 = 0 \end{equation}