TeX Quellcode:

\begin{array}{rclcl} 16y^2+61y+169+97y &=& -201-24y^2+5-122y-125 \cr 16y^2+158y+169 &=& -24y^2-122y-321 & \vert & +24y^2+122y+321 \cr 40y^2+280y+490 &=& 0 &\vert& : 40 \cr y^2+7y+\dfrac{49}{4} &=& 0\cr y_{1,2} &=& -\dfrac{7}{2}\pm\sqrt{\left(\dfrac{7}{2}\right)^2-\dfrac{49}{4}} \cr y_{1,2} &=& -\dfrac{7}{2}\pm\sqrt{0} \cr y_{1,2} &=& -\dfrac{7}{2} \cr \cr \mathbb{L} &=& \left\{-\dfrac{7}{2}\right\} \end{array}