Réponse :
Bonjour,
A = 3 -2/3 = 9/3 -2/3 = 7/9 = 7/9 X 3/28 = 21/252 = 7/84
4/3 X7 28/3 28/3
B = 2/3 = 2/3 = 2/3 = 2/3 X 30/13 = 60/33 = 20/11
5/6 -2/5 25/30 -12/30 13/30
C = -3/4 +1/2 = -3/4 +1/2 X 2/2 = -3/4 + 2/4 = -1/4 = -1/4 X 10/29
2/5 +5/2 2/5 X 2/2 +5/2 X 5/5 4/10 +25/10 29/10
= - 10/116 = -5/58
Explications étape par étape :
