Bonjour
Résoudre les équations suivantes
1. 5x – 1 = 7x - 3
5x - 7x = - 3 + 1
- 2x = - 2
x = 2/2
x = 1
2. 3x – 4(x + 1) = 2
3x - 4x - 4 = 2
- x = 4 + 2
- x = 6
x = - 6
3. (3x + 1)(-2x + 5) = 0
3x + 1 = 0 ou - 2x + 5 = 0
3x = - 1 - 2x = - 5
x = - 1/3 x = 5/2
4.(1/3x + 2) (3x - 1/7) = 0
1/3x + 2 = 0 ou 3x - 1/7 = 0
1/3x = - 2 3x = 1/7
x = - 6 21x = 1
x = 1/21
5. 3x - 4x²= 0
x (3 - 4x) = 0
x = 0 ou 3 - 4x = 0
- 4x = - 3
x = 3/4
6. 3x(x – 1) – 2(x - 1) = 0
(x - 1) (3x - 2) = 0
x - 1 = 0 ou 3x - 2 = 0
x = 1 3x = 2
x = 2/3.
