Réponse :
[tex]D = -\dfrac{284}{25}[/tex]
[tex]E = -\dfrac{73}{9}[/tex]
[tex]F = -\dfrac{92}{15}[/tex]
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
[tex]\bf{D = -284/25}[/tex]
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
[tex]\bf{E = -73/9}[/tex]
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
[tex]\bf{F = -92/15}[/tex]
