Bonjour
Calculer et donner chaque résultat sous forme d'une fraction irréductible :
L = - 4/7 x 5/6 x - 3/7
L = - 20/42 x - 3/7
L = 60/294
L = (6 x 10) / (6 x 49)
L = 10/49
M = (5/8 - 7/6) x (8/5 - - 3/35)
M = [(5 x 3) / (8 x 3) - (7 x 4) / (6 x 4)] x [(8 x 7) / (5 x 7) + 3/35]
M = (15/24 - 28/24) x (56/35 + 3/35)
M = - 13/24 x 59/35
M = - 767/840
