TeX Quellcode:

\begin{array}{rclcl} 0 &=& -3z^2+22z-42 &\vert& :(-3) \cr 0 &=& z^2-\dfrac{22}{3}z+14 &\vert& \text{p-q-Formel} \cr\cr z_{1,2} &=& \dfrac{11}{3} \pm \sqrt{\left(-\dfrac{11}{3}\right)^2-14} \cr z_{1,2} &=& \dfrac{11}{3}\pm\sqrt{-\dfrac{5}{9}} \end{array}