-2.5 4 setxrange
-3 2 setyrange

2.1 setxyrapport
60 setxunit
7.5 setborder
90 setangle_repere
-1.5 2.5 setxrange
-3 2 setyrange

traceaxes
axesarrow

%unites
/f {setxvar
#rpn#   (-x^2+x-0.7)
} def


gsave
   noir
   0.5 setlinewidth
   continu
-1  2 {f} Courbe
grestore

<latex>
$m-1<0$
</latex>
1.2 -1.2 [1.3 dup] dltexlabel

<latex>
$\Delta <0$
</latex>
1.18 -1.9 [1.3 dup] dltexlabel