TeX Quellcode:
\begin{array}{crclcll}& -x + 4 &=& -x^2 + 4{,}5x + 4 &\vert & +x^2-4{,}5x-4 \cr & x^2-5{,}5x &=& 0 \cr & x\left(x-5{,}5\right) &=& 0 &\vert& \text{Satz vom Nullprodukt} \cr \text{Faktor 1:} & x_1 &=& 0 \cr\cr \text{Faktor 2:} & x_2-5{,}5 &=& 0 &\vert& +5{,}5 \cr & x_2 &=& 5{,}5 \end{array}