TeX Quellcode:

\begin{array}{rclcl} z_1 = x^2 &=& -\dfrac{1}{5} &\vert& \pm\sqrt{} \cr\cr x_{2,3} &=& \pm\sqrt{-\dfrac{1}{5}} \cr\cr z_2 = x^2 &=& -2 &\vert& \pm\sqrt{} \cr\cr x_{4,5} &=& \pm\sqrt{-2} \end{array}