TeX Quellcode:

\begin{array}{rclcl}0 &=& 4z^2+20z+29 &\vert& :4 \cr 0 &=& z^2+5z+\dfrac{29}{4} &\vert& \text{p-q-Formel} \cr z_{1,2}&=&-\dfrac{5}{2} \pm \sqrt{\left(\dfrac{5}{2}\right)^2-\dfrac{29}{4}} \cr &=& -\dfrac{5}{2}\pm \sqrt{-1} &\vert& \sqrt{-1}=i \cr\cr z_1 &=& -\dfrac{5}{2}+i \cr z_2 &=& - \dfrac{5}{2}-i \end{array}