TeX Quellcode:

\begin{array}{rclcl} 24-x^2 &=& 2x & \vert & +x^2-24 \cr 0 &=& x^2+2x-24 \cr x_{1,2} &=& -1\pm\sqrt{1+24} \cr\cr x_1 &=& 4 \cr x_2 &=& -6 \cr \cr \mathbb{L} &=& \{-6;4\} \end{array}