TeX Quellcode:

\begin{array}{rclcl} \dfrac{x^2+x-2}{x-1} &=& 0 &\vert& \cdot (x-1) \cr x^2+x-2 &=& 0 &\vert& \text{p-q-Formel} \cr & \dots \cr x_1 &=& 1 \cr x_2 &=& -2\end{array}