Sagot :
Exercice 1 :
a. (2x + 8) (3x - 1) = 0
2x + 8 = 0 ou 3x - 1 = 0
2x = -8 3x = 1
x = -4 x = 1/3
b. (x - 2) (3 + 2x) = 0
x - 2 = 0 ou 3 + 2x = 0
x = 2 2x = -3
x = -(3/2)
x = -1,5
c. (5x - 2) (3x - 2) = 0
5x - 2 = 0 ou 3x - 2 = 0
5x = 2 3x = 2
x = 2/5 x = 2/3
x = 0,4