TeX Quellcode:

\begin{array}{rclll}-28z^4+7\sqrt{3}i &=& 7 &\vert& -7\sqrt{3}i \\-28z^4 &=& 7-7\sqrt{3}i &\vert& :(-28) \\z^4 &=& -\dfrac{1}{4}+\dfrac{\sqrt{3}}{4}i &\vert & \sqrt[4]{} \\z &=& \sqrt[4]{-\dfrac{1}{4}+\dfrac{\sqrt{3}}{4}i}\end{array}