Réponses

2014-05-10T15:20:09+02:00
(2x-1)(3x+5) = 0
<=> (2x-1) = 0 OU (3x+5) = 0
<=> 2x = 1 OU 3x = -5
<=> x = 1/2 ou x = -5/3

S={1/2; -5/3}
2014-05-10T15:21:20+02:00
2x - 1 = 0       ou      3x + 5 = 0.
     2x = 1                      3x = -5
       x = 1/2                     x = -5/3