Bonjour
Résoudre dans R les équations suivantes :
a) 4x -5= -2x - 1
4x + 2x = - 1 + 5
6x = 4
x = 4/6
x = 2/3
b) (3x + 2)(-x + 4) = 0
3x + 2 = 0 ou - x + 4 = 0
3x = - 2 - x = - 4
x = - 2/3 x = 4
c) x -2(x - 5) = 0
x - 2x + 10 = 0
x - 2x = - 10
- x = - 10
x = 10
d) (x + 4)² - 9 = 0
(x + 4 - 3) (x + 4 + 3) = 0
(x + 1) (x + 7) = 0
x + 1 = 0 ou x + 7 = 0
x = - 1 x = - 7
e) 4x² = 3x
4x² - 3x = 0
x (4x - 3) = 0
x = 0 ou 4x - 3 = 0
4x = 3
x = 3/4.
