Verified answer

Réponse :

Explications étape par étape

Bonjour

Calculer :

D = (4/5)^2 - 2 x 3^2 + 6

D = 16/25 - 2 x 9 + 6

D = 16/25 - 18 + 6

D = 16/25 - 12

D = 16/25 - (12 x 25)/25

D = 16/25 - 300/25

E = 1 - 5/7 x 14 + 8/9

E = 1 - 14/7 x 5 + 8/9

E = 1 - 2 x 5 + 8/9

E = 1 - 10 + 8/9

E = -9 + 8/9

E = (-9 x 9)/9 + 8/9

E = -81/9 + 8/9

F = (1 + 1/3)(2 - 3/5) - 8

F = (3/3 + 1/3)(10/5 - 3/5) - 8

F = 4/3 x 7/5 - 8

F = (4 x 7)/(3 x 5) - (8 x 15)/15

F = 28/15 - 120/15