- TeX source:
- \begin{array}{rclcl}x^2+3x-54 &=& 0 &\vert & \text{p-q-Formel}\\x_{2,3} &=& -\dfrac{3}{2}\pm\sqrt{\left(\dfrac{3}{2}\right)^2+54}\\\\x_{2,3} &=& -\dfrac{3}{2}\pm\sqrt{\dfrac{225}{4}}\\\\x_2 &=& -\dfrac{3}{2}+\dfrac{15}{2} = 6 \\\\x_3 &=& -\dfrac{3}{2}-\dfrac{15}{2} = -9 \\\\\mathbb{L} &=& \left\{-9;-1;6\right\}\end{array}