Réponse :
Bonsoir
Explications étape par étape
A )
2 - ( x + 3) = 4x + (-3x - 1)
2 - x - 3 = 4x - 3x - 1
-1 - x = x - 1
-x -x = -1 + 1
-2x = 0
X = 0/(-2)
X = 0
B)
(3x + 5)^2 - 64 = 0
(3x+5+8)(3x+5-8) = 0
(3x+13)(3x-3) = 0
3x + 13 = 0 ou 3x-3 =0
3x = -13 ou 3x = 3
X = -13/3 ou x = 3/3
X = -13/3 ou x = 1
C)
(2x+1)(2x+3)+(2x+3)(x-5) = 0
(2x+3)[(2x+1)+(x-5)] = 0
(2x+3)(2x+1+x-5) = 0
(2x+3)(3x-4) = 0
2x + 3 = 0 ou 3x - 4 = 0
2x = -3 ou 3x = 4
X = -3/2 ou x = 4/3
