Réponses

2014-05-07T19:14:39+02:00
A = 21 /4 x (-2/3)²   : -7/3
a = 21/4x 4/9  : -7/3
a = 21/9 x -3/7
a = 7/3 x -3 /7
a = -1

b = 3x 10p3 +2x10p3  : 5x10p4
b = 5 x10p 6  / 5x10p4
b = 10p6/10p4
b = 10p6 x 10 p -4
b = 10p2