TeX Quellcode:

\begin{array}{rclll}-\dfrac{1}{20} &=& -\dfrac{\ln(x^2-8)+1}{20} &\vert & \cdot (-20)\cr 1 &=& \ln(x^2-8)+1 &\vert & -1\cr 0 &=& \ln(x^2-8) &\vert & e^{*}\cr 1 &=& x^2-8 &\vert & +8\cr 9 &=& x^2 &\vert & \pm\sqrt{}\cr\cr x_1 &=&3\;\in\;\mathbb{D} & & \rightarrow \quad P_2 \left( 3 \mid -\dfrac{1}{20} \right)\cr\cr x_2 &=&-3\;\in\;\mathbb{D} & & \rightarrow \quad P_3 \left( -3 \mid -\dfrac{1}{20} \right)\end{array}