TeX Quellcode:

\begin{array}{rclcl} 0 &=& 3x^2-x+4 & \vert & :3 \cr 0 &=& x^2-\dfrac{1}{3}x+\dfrac{4}{3} \cr\cr x_{3,4} &=& \dfrac{1}{6} \pm\sqrt{\left(-\dfrac{1}{6}\right)^2-\dfrac{4}{3}} \cr &=& \dfrac{1}{6} \pm\sqrt{-\dfrac{47}{36}} \end{array}