Réponses

2014-03-12T12:28:42+01:00

Calculer D= (2/3-2)/(2/3+2)
D = (2/3-6/3)/(2/3+6/3)

D =  -4/3 / 8/3

D = -4/3 * 3/8

D = -1 * 1/2

D = - 1/2

2014-03-12T12:30:00+01:00
2/3-2 =2/3-6/3 =-4/3
2/3+2 =2/3+6/3 =8/3
(2/3-2)/(2/3+2) =(-4/3)/8/3 =-4/3x3/8 =-12/24 =-1/2