TeX Quellcode:

\begin{array}{rclcll}-5x^{2} + x + 2 &=& -x^{2} + x + 1 &\vert & +5x^{2} -x -2 \cr 0 &=& 4x^2 - 1 &\vert & +1 \cr 1 &=& 4x^2 &\vert & :4 \cr \dfrac{1}{4} &=& x^2 &\vert & \pm\sqrt{} \cr x_1 &=& \dfrac{1}{2} \cr x_2 &=& -\dfrac{1}{2} \end{array}