Réponse :
Explications étape par étape :
Bonjour
E = 3/4 × 12/15
E = (3×12)/(4×15)
E = (3×3×4) / (4×3×5)
E = 3/5
F = -10 / 7 × 21 / (-50)
F = (-10 × 21) / (7×(-50))
F = (-10 × 7×3) / ( 7 × (- 10)×5)
F = 3/5
G = 77/49 × 35/ - 121
G = - (77 × 35 ) / (49 × 121 )
G = - ( 7×11×5×7) /(7×11×7×11)
G = - (5/11)
