J'ai besoin d'aide svp pour l'exercice n°1 B,C,D...je vous en remercie beaucoup.

B = [(1/4) + (-3/2)]/[(-3/5) - (1/2)]

Numérateur =  [(1/4) + (-3/2)] = (1 - 6)/4 = - 5/4

Dénominateur = [(-3/5) - (1/2)] = (-6/10) - (5/10) = - 11/10

B = - 5/4/-11/10 = - 5 x 10)/(-11 x 4) = 25/22

C = [(5/2) + (-8/3)]/[(3/4) - (1/6)]

Numérateur = [(5/2) + (-8/3)] = (15/6) + (-16/6) = - 1/6

Dénominateur = [(3/4) - (1/6)] = (9/12) - (2/12) = 7/12

C = - 1/6/7/12 = (- 1 x 12)/(6 x 7) = - 2/7

D = (2/3) - (2/3 + (3)) : 3/-7

(2/3 + (3)) = 2/3) + 9/3 = 11/3

11/3) : -2/7 = 11 x 7/- 2 x 3 = - 77/6

C = (2/3) - (- 77/6)) = (4 + 77)/6 = 81/6 = 27/2