TeX Quellcode:

\begin{array}{rclcl} -2x(-ix+5x-10i) &=& x^3+10(5x-10i) \cr 2ix^2-10x^2+20ix &=& x^3+50x-100i &\vert& -x^3-50x+100i \cr-x^3+2ix^2-10x^2+20ix-50x+100i &=& 0 \cr-x^3+(-10+2i)x^2+(-50+20i)x+100i &=& 0 \end{array}