Sagot :
A = 5/1 x 2/3 = 5x2/1x3 = 10/3
B = -7/5 x 4/1 = - (7x4)/(5x1) = -28/5
C = - (5x11) / (6x4) = -55/24
D = (8x10) / (9x9) = 80/81
Réponse:
Bonjour !
Explications étape par étape:
A=5×2/3
=5/1×2/3
=5×2/1×3
=10/3
B=-7/5×4
=-7/5×4/1
=-7×4/5×1
=-28/5
C=5/6×-11/4
=5×-11/6×4
=-55/24
D=-8/9×-10/9
=-8×-10/9×9
=80/81
J'espère avoir pu t'aider !