Réponses

2014-01-12T16:19:04+01:00
(x-2)(x+11)=4(x+11) 
(x-2) (x+11) - 4 (x+11) =0
(x+11) (x-2-4) = 0
(x+11) (x-6) = 0
admet 2 solutions :
x+11=0
x = -11
ou
x-6=0
x=6