TeX Quellcode:

\begin{array}{rclll} 2-\sqrt{k+2} &\neq & 0 &\vert & -2 \\-\sqrt{k+2} &\neq & -2 &\vert & \left(\right)^2\\k+2 &\neq & 4 &\vert & -2 \\k &\neq & 2\end{array}