Réponses

  • Utilisateur Brainly
2014-05-21T16:27:41+02:00
(12x+3) (2x-7) - (2x-7)² = 0

on facto :
(2x-7)(12x+3-2x+7) = 0
(2x-7)(10x+10) = 0
10(2x-7)(x+1) = 0 j'ai facto 10 en +

2x-7 = 0
2x =7
x =7/2

x+1 = 0
x =-1