Bonjour
exercice 2 :
L = 1 + (-15/7) + [-3/(-5)]
L = 35/35 - (15 x 5)/(7 x 5) + (3 x 7)/(5 x 7)
L = 35/35 - 75/35 + 21/35
L = 56/35 - 75/35
L = -19/35
P = -11 + 1/11 + 1/6 - 6
P = -121/11 + 1/11 + 1/6 - 36/6
P = -120/11 - 35/6
P = (-120 x 6)/(11 x 6) - (35 x 11)/(6 x 11)
P = -720/66 - 385/66
P = -1105/66
exercice 3 :
T = -10/(-15) x (-25)/23 x 115/(-8)
T = (2 x 5)/(3 x 5) x 25/23 x 115/8
T = 2/3 x 25/23 x 115/8
T = 2/8 x (25 x 115)/(23 x 3)
T = 2/(2 x 4) x (25 x 115)/(23 x 3)
T = 1/4 x 2875/69
T = 2875/276
U = -17/27 x (-49)/(-119) x 15/(-105) x (-45)
U = -(17 x 49 x 15 x 45)/(27 x 119 x 105)
U = -(17 x 7 x 7 x 3 x 5 x 9 x 5)/(3 x 9 x 119 x 3 x 7 x 5)
U = -(17 x 7 x 5 x 3 x 7 x 5 x 9)/(3 x 119 x 3 x 7 x 5 x 9)
U = -(17 x 7 x 5)/(3 x 119)
U = -(17 x 5 x 7)/(3 x 17 x 7)
U = -5/3
