Réponses

2014-10-16T21:27:47+02:00
(6x+1)(3x+4)-(6x+1)²
(6x+1)[3x+4-(6x+1)]
(6x+1)(3x+4-6x-1)
(6x+1)(-3x+3)
3(6x+1)(-x+1)