TeX Quellcode:
\begin{array}{rclcl} x^2+x+\dfrac{5}{4}&=&0 &\vert& \text{p-q-Formel} \cr x_{2,3}&=&-\dfrac{1}{2}\pm \sqrt{\left(\dfrac{1}{2}\right)^2-\dfrac{5}{4}} \cr &=& -\dfrac{1}{2} \pm \sqrt{-1} &\vert& \sqrt{-1}=i \cr \cr x_2 &=& -\dfrac{1}{2}+i \cr \cr x_3 &=& -\dfrac{1}{2}-i \cr \cr \mathbb{L} &=& \left\{-1 \; ; \; -\dfrac{1}{2}+i \; ; \; -\dfrac{1}{2}-i\right\}\end{array}