Réponse :
Explications étape par étape
T = - 10/(-15) x -25/23 x 115/(- 8)
T = (5 x 2)/(5 x 3) x 25/23 x 115/8
T = 2/3 x 25/8 x 115/23
T = 2/8 x 25/3 x (23 x 5)/23
T = 2/(2 x 4) x 25/3 x 5
T = 1/4 x 125/3
T = 125/12
U = - 17/27 x -49/(-119) x 15/(-105) x (-45)
U = -17/27 x 49/119 x 15/(7 x 15) x 45
U = -17/27 x 49/119 x 1/7 x 45
U = -17/119 x 49/7 x 45/27
U = -17/(17 x 7) x (7 x 7)/7 x (9 x 5)/(9 x 3)
U = -1/7 x 7 x 5/3
U = -7/7 x 5/3
U = -5/3
