TeX Quellcode:

\begin{array}{rclcl} 0 &=& x^2+4x-5 &\vert& \text{p-q-Formel} \cr x_{1,2} &=& -2 \pm \sqrt{2^2+5} \cr &=& -2 \pm \sqrt{9} \cr\cr x_1 &=& -2+3 = 1 \cr x_2 &=& -2-3 = -5 \end{array}