TeX Quellcode:
\begin{array}{rclcll} \dfrac{1}{5} &=& \dfrac{1}{x^2-4} & \vert & \cdot 5\left(x^2-4\right) \cr x^2-4 &=& 5 & \vert & +4 \cr x^2 &=& 9 &\vert& \pm\sqrt{} \cr\cr x_1 &=& -3\in\mathbb{D} & & \rightarrow \quad P_2\left(-3 \mid \dfrac{1}{5}\right) \cr x_2 &=& 3\in\mathbb{D} & & \rightarrow \quad P_3\left(3 \mid \dfrac{1}{5}\right)\end{array}