Réponses

2014-10-27T18:30:38+01:00
X²= 3
x²-3 =0

identite remarquable (a-b)(a+b) = a² -b²

(x-√3)(x+√3) =0

x-√3 =0                      x+√3 =0
x = √3                        x = -√3
2014-10-27T18:42:11+01:00