315/60= 21/4

-140/224= -5/8

586/42= 293/41

1764/-446= 882/-223

Réponse :

Bonsoir

Explications étape par étape

a) 315/60 = (3×5×21)/(3×5×4) = 21/4

b) - 140/224 = - (4×5×7)/(4×8×7) = - 5/8

c) 586/42 = (2×293)/(2×21) = 293/21

d) - 1764/448 = - (2²×3²×7²)/(2^6×7) = - 63/16