Réponses

2014-09-13T18:15:30+02:00
(3x+2)²-9
[(3x+2)-3] [(3x+2)+3]
(3x+2-3)(3x+2+3)
(3x-1)(3x+5)
2014-09-13T18:19:49+02:00


Bonsoir

identité remarquable à appliquer a² - b² = (a+b)(a-b)

3x+2)²-9


[(3x+2)-3] [(3x+2)+3]


(3x+2-3)(3x+2+3)


(3x-1)(3x+5)