\input $HOME/tex_doc/format/myplain.tex %\magnification 1200 %\bookstyle \titrestyle {\twentybf } \withoutcorrigbody %\withoutexobody \let \exo \Exo \date {18 septembre 2001} \classification {Algèbre}{(4)} \classe {1 gm$_{\scriptscriptstyle 2}$} \titre {Signe d'un polynôme du 2nd degré} \def \datapath {% $HOME/tex_doc/lycee/database/1ere/sti/algebre/polynome/} \input \datapath pol2_008.tex \input \datapath pol2_009.tex \input \datapath pol2_007.tex \input \datapath geom_001.tex \end