TeX Quellcode:

\begin{array}{rclcl} -9x^2+8x-1 &=& -10x^2-\dfrac{6}{5}x+7 & \vert & +10x^2+\dfrac{6}{5}x-7 \cr x^2+\dfrac{46}{5}x-8 &=& 0 &\vert& \text{p-q-Formel} \cr x_{1,2} &=& -\dfrac{46}{10} \pm \sqrt{\left(\dfrac{46}{10}\right)^2-(-8)} \cr x_{1,2} &=& -\dfrac{46}{10} \pm \sqrt{\dfrac{2.916}{100}} \cr \cr x_1 &=& -\dfrac{46}{10} + \dfrac{54}{10} = \dfrac{4}{5} \cr x_2 &=& -\dfrac{46}{10} - \dfrac{54}{10} = -10 \end{array}