Bonjour
Résoudre les équations :
(-4x + 2)/5 = 2
-4x + 2 = 2 * 5
-4x + 2 = 10
4x = 2 - 10
x = (-8/4)
x = (-2)
-x/2 - 1 = x/4 + 2
-2 - 1 = x/4 + x/2
-3 = x/4 + 2x/4
-3 = 3x/4
x = -3 * 4/3
x = (-4)
2(x + 1) - 1/2 = 2x + 1,5
2x + 2 - 1/2 = 2x + 1,5
2x - 2x = 1,5 - 2 + 1/2
0 = 2 - 2
0 = 0
Quelque soit x, l’équation est toujours vraie
(4x + 3)(x - 2) - (4x + 3)(2x - 5) = 0
(4x + 3)(x - 2 - 2x + 5) = 0
(4x + 3)(-x + 3) = 0
4x + 3 = 0 ou -x + 3 = 0
4x = -3 ou x = 3
x = -3/4 ou x = 3
x^2 - 8x + 16 = 0
x^2 - 2 * x * 4 + 4^2 = 0
(x - 4)^2 = 0
x - 4 = 0
x = 4
x(x + 1) = (x + 1)
x(x + 1) - (x + 1) = 0
(x + 1)(x - 1) = 0
x + 1 = 0 ou x - 1 = 0
x = -1 ou x = 1
(x + 2)^2 = x(x + 4)
(x + 2)^2 - x(x + 4) = 0
x^2 + 4x + 4 - x^2 - 4x = 0
4 = 0 impossible donc aucune solution possible
