Résoudre
(
6
−
x
)
x
2
+
7
x
+
12
=
1
:
x
=
−
4
o
x
=
−
3
o
x
=
5
o
x
=
7
x
=
−
4
o
x
=
−
3
o
x
=
5
o
x
=
7
Réponse
x
=
−
4
o
x
=
−
3
o
x
=
5
o
x
=
7