Bonjour :) L'exercice 1 est déjà résolu Donc svp exercice 2 & 3

Salut,

Exercice 2 :

Aire d'un rectangle = l x L, ici l = 14 et on sait que le produit = 94.25

14 L = 94.25
L = 94.25 / 14 = 6.73m

Exercice 3 :

3/4x + 2 = 0
3/4x = -2
x = -2 / (3/4)
x = -8/3

2x + √3 = 5x  + 8
2x - 5x = 8 -√ 3
-3x = 8 -√3
x = (8-√3) / (-3 )
x = -8 + √ 3 / 3

3/x = -4 / (x+1)
x/3 = (x+1) / (-4)
x/3 - (x+1) / (-4) = 0
4x / 12 + 3(x+1)/12 = 0
(4x+3x + 3) / 12 = 0
7x + 3 = 0
7x = -3
x = -3/7