Réponse :
Explications étape par étape
Bonsoir
A = (7/6 - 4/3 x 4/5) x (8/5 : 4/3 + 2)
A = (7/6 - 16/15) x (8/5 x 3/4 + 2)
A = (35/30 - 32/30) x (8/4 x 3/5 + 2)
A = 3/30 x (2 x 3/5 + 10/5)
A = 1/10 x (6/5 + 10/5)
A = 1/10 x 16/5
A = (2 x 8)/(2 x 25)
A = 8/25
B = 15/(3/4 - 1/2) x (2/5 + 2/3)/-4
B = 15/(3/4 - 2/4) x (6/15 + 10/15)/-4
B = 15/(1/4) x (16/15)/(-4)
B = 15 x 4/-4 x 16/15
B = -16
