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\begin{MonTableau}{3}{5}{.75}
\small
\TabNewCol{0}
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{\footnotesize\rTabPut{B}{-.5}{.08}{\TabTitre{Sgn.}{x+6}}
\footnotesize\rTabPut{B}{-.5}{.08}{\TabTitre{Sgn.}{2x+3}}
\footnotesize\rTabPut{B}{-.5}{.08}{\TabTitre{Sgn.}{f(x)}}}
\TabNewCol{0}
\rTabPut{Bl}{.15}{.25}{$-\infty$}
\TabNewCol{.333}
\rTabPut{B}{0}{.25}{$-6$}
\rTabPut[2]{B}{0}{.4}{\TabZ}
\rTabPut[1]{B}{0}{.4}{}
\rTabPut[2]{B}{0}{.4}{\TabZ}
\TabNewCol{.667}
\rTabPut{B}{0}{.25}{$-\frac{3}{2}$}
\rTabPut[1]{B}{0}{.4}{}
\rTabPut[2]{B}{0}{.4}{\TabZ}
\rTabPut[2]{B}{0}{.4}{\TabZ}
\TabNewCol{1}
\rTabPut{Br}{-.15}{.25}{$+\infty$}
\rput(.166,.5){$-$}\rput(.5,.5){$+$}\rput(.833,.5){$+$}
\rput(.166,1.5){$-$}\rput(.5,1.5){$-$}\rput(.833,1.5){$+$}
\rput(.166,2.5){$+$}\rput(.5,2.5){$-$}\rput(.833,2.5){$+$}
\end{MonTableau}}
