Réponses

Meilleure réponse !
2013-11-02T12:32:16+01:00
X=0
(2x0-3)(0+2)-5(2x0-3)
(-3)(2)-5(-3)
-6+15=9
x=-2
(2x(-2)-3)(-2+2)-5(2x(-2)-3)
(-4-3)(0)-5(-4-3)
0-5(-7)=0-(-35)=0+35=35
x=3/2
(2x3/2-3)(3/2+2)-5(2x3/2-3)
(6/2-3)(3/2+2)-5(6/2-3)
(6/2-6/2)(7/2)-5(6/2-6/2)
0(7/2)-5(0)=0-0=0
x=3
(2x3-3)(3+2)-5(2x3-3)
(6-3)(5)-5(6-3)
15-15=0