TeX Quellcode:

\begin{array}{rclcl}x^2-x-2&=&0 \\x_{1,2}&=&\dfrac{1}{2}\pm\sqrt{\dfrac{1}{4}+2} \\\\x_1 &=& \dfrac{1}{2}+\dfrac{3}{2} = 2 \\x_2 &=& \dfrac{1}{2}-\dfrac{3}{2} = -1\end{array}