TeX Quellcode:

\begin{array}{crclcl} & \mathbb{D} &=& \mathbb{R} \cr \cr & y^3+y^2+4 &=& -4y &\vert& +4y \cr & y^3+y^2+4y+4 &=& 0 \cr & \left(y^3+y^2\right)+(4y+4) &=& 0 \cr & y^2(y+1)+4(y+1) &=& 0 \cr & \left(y^2+4\right)(y+1) &=& 0 &\vert& \text{Satz vom Nullprodukt} \cr \text{Faktor 1:} & y^2+4 &=& 0 &\vert& -4 \cr & y^2 &=& -4 &\vert& \pm\sqrt{} \cr & y_{1,2} &=& \pm\sqrt{-4} \cr\cr \text{Faktor 2:} & y+1 &=& 0 &\vert& -1 \cr & y &=& -1 \end{array}