TeX Quellcode:

\begin{array}{rclll}\dfrac{x^2-x+6}{x^2-3x+8} &=& 0 &\vert& \cdot\left(x^2-3x+8\right) \cr x^2-x+6 &=& 0 & \vert & \text{p-q-Formel} \cr x_{1,2} &=& \dfrac{1}{2}\pm\sqrt{\left(\dfrac{1}{2}\right)^2-6} \cr x_{1,2} &=& \dfrac{1}{2}\pm\sqrt{-\dfrac{23}{4}}\end{array}