TeX Quellcode:

\begin{array}{rclcl} -x^2-10x-50 &=& 0 &\vert& \cdot (-1) \cr x^2+10x+50 &=& 0 &\vert& \text{p-q-Formel} \cr x_{2,3} &=& -5\pm \sqrt{5^2-50} \cr &=& -5\sqrt{-25} \cr &=& -5\sqrt{-1\cdot 25} \cr&=& -5 \pm 5 \sqrt{-1} &\vert& \sqrt{-1}=i \cr \cr x_2 &=& -5+5i \cr x_3 &=& -5-5i \cr \cr \mathbb{L} &=& \left\{2i \; ; \; -5+5i \; ; \; -5-5i \right\} \end{array}