TeX Quellcode:

\begin{array}{rclll}23y^2+4y+7 & = & 0 &\vert & :23\\y^2+\dfrac{4}{23}y+\dfrac{7}{23} & = & 0 &\vert & \text{p-q-Formel}\\y_{1,2} & = & \dfrac{2}{23}\pm\sqrt{\left(-\dfrac{2}{23}\right)^2-\dfrac{7}{23}}\\\\y_{1,2} & = & \dfrac{2}{23}\pm\sqrt{-\dfrac{157}{529}}\\\\\end{array}