Bonsoir,
D = 11/9 - 5/4 + 5
D = (11 x 4) / (9 x 4) - (5 x 9) / (4 x 9) + (5 x 36) / (1 x 36)
D = 44/36 - 45/36 + 180/36
D = 179/36
E = - 5/3 - 5/6 + 5/9
E = (- 5 x 6) / (3 x 6) - (5 x 3) / (6 x 3) + (5 x 2) / (9 x 2)
E = - 30/18 - 15/18 + 10/18
E = - 35/18.
