Réponses

2012-09-08T10:54:40+02:00

(x-2)(x+2)-9 < 0

(x-2)^2-3^2 < 0

(x-2-3)(x-2+3) < 0

(x-5)(x+1) < 0

x-5 < 0 ou x+1< 0

x < 5 ou x < -1