$$x^6-25x^3-54 = 0$$
Answer
$$ \begin{matrix}x_1 = 3 & x_2 = -1.25992 & x_3 = 0.62996+1.09112i \\[1 em] x_4 = 0.62996-1.09112i & x_5 = -1.5+2.59808i & x_6 = -1.5-2.59808i \end{matrix} $$
Explanation
This page was created using
Equations Solver