TeX Quellcode:

\begin{array}{rclcl} x^2 - 4x + 6 &=& 0 &\vert& \text{p-q-Formel} \cr x_{1,2} &=& 2\pm\sqrt{4-6} \cr x_{1,2} &=& 2\pm\sqrt{-2} \cr\cr \end{array}