Réponses

2014-01-04T10:21:12+01:00
Bonjour

a) 4x²=3x²

4x² - 3x² = 0
x² = 0 
x = 0
S = {0}


b) (2x - 1)(x + 3) = 0
2x - 1 = 0   ou   x + 3 = 0
2x = 1        ou   x + 3 = 0
x = 1/2      ou x = -3

S = {1/2 ; 3}