Réponse :
Explications étape par étape :
Exercice 2
a) x= 2 ou x = -3/2
b) x=0 ou x = -3/2
c) x =0 ou x = -5
d) x = 5 ou x = -5
e) Pas de solution
f) x = -2
g) x = 0
Exercice 3
a) (2x+1)² = (4x+3)²
(2x+1)² - (4x+3)²=0
(2x+1+4x+3)(2x+1-4x-3) = 0
(6x +4) (-2x -2) = 0
x = -2/3 ou x = -1
b) x²+6x = -9
x²+6x+9 = 0
(x + 3)² = 0
x = -3
c) 16x² = 81
(4x-9) (4x+9) = 0
x = 4/9 ou x = -4/9
d) (2x-1)²-(3x-2)(2x-1) = 0
(2x -1 ) ( 2x-1-3x+2) = 0
(2x-1) ( -x +1 ) = 0
x = 1/ 2 ou x = 1
