TeX Quellcode:

\begin{array}{rclll} z^2+z-4 &=& 0 &\vert& \text{p-q-Formel}\\z_{1,2} &=& -\dfrac{1}{2}\pm\sqrt{\left(\dfrac{1}{2}\right)^2+4}\\z_{1,2} &=& -\dfrac{1}{2}\pm\sqrt{\dfrac{17}{4}}\\z_1 &=& \dfrac{-1+\sqrt{17}}{2} \approx 1{,}56\\z_2 &=& \dfrac{-1-\sqrt{17}}{2} \approx -2{,}56\\\end{array}