TeX Quellcode:

\begin{array}{rclcl} u^2+2u-1 &=& 0 &\vert& \text{p-q-Formel} \cr u_{1,2} &=& -1 \pm \sqrt{1+1} \cr\cr u_1 &=& -1+\sqrt{2} \cr u_2 &=& -1-\sqrt{2}\end{array}