TeX Quellcode:

\begin{array}{rclcl} 2x^2 &=& 98 &\vert & :2 \cr x^2 &=& 49 &\vert &\pm\sqrt{} \cr x_{1,2} &=& \pm\sqrt{49} \cr\cr x_1 &=& 7 \cr x_2 &=& -7 \cr\cr \mathbb{L} &=& \{-7;7\} \end{array}