Voici son code :
\begin{variations} x & \mI & & 2 & &\pI\\ \filet\filet -4 & & -~~ & \z & ~~- & \\ \filet x-2 & & -~~ & \z & ~~+ & \\ \filet\filet %------------------------------------------------------ -4(x-2) & & +~~ & \z & ~~- & \\ \end{variations}
Voici son code :
\begin{variations} x & ~0 & & 2 & &\pI\\ \filet\filet -4 & \bg & ~~-~~ & \l & ~~- & \\ \filet x & \bg & + & \l & ~~+ & \\ \filet x-2 & \bg & - & \z & ~~+ & \\ \filet\filet %------------------------------------------------------ \frac{-4}{x(x-2)} & \bg & + & \z & ~~- & \\ \end{variations}