Bonjour
A=-5/6+4/4
A = (5 x 2) / (6 x 2) + (4 x 3) / (4 x 3)
A = 10/12 + 12/12
A = 22/12
A = (2 x 11) / (2 x 6)
A = 11/6
7/6-6/7
= (7 x 7) / (6 x 7) - (6 x 6) / (7 x 6)
= 49/42 - 36/42
= 13/42
B =-5/6+3/4
= (- 5 x 2) / (6 x 2) + (3 x 3) / (4 x 3)
= - 10/12 + 9/12
= - 1/12
