TeX Quellcode:

\begin{array}{rclcl} -\dfrac{5}{4}x^2-\dfrac{1}{9}+\dfrac{7}{18}+\dfrac{x^2}{2} &=& \dfrac{5}{18}-\dfrac{9}{8}x^2+\dfrac{3x^2}{8} \cr -\dfrac{3}{4}x^2\dfrac{5}{18} &=& -\dfrac{6}{8}x^2+\dfrac{5}{18} & \vert & -\dfrac{5}{18} \cr -\dfrac{3}{4}x^2 &=& -\dfrac{6}{8}x^2 & \vert & \cdot 4 \cr -3x^2 &=& -3x^2 & \vert & +3x^2 \cr 0 &=& 0 \cr \cr \mathbb{L} &=& \mathbb{R} \end{array}