Réponses

2014-08-06T16:04:31+02:00
3x² - 5x = 0 => x(3x - 5) = 0 => x = 0 ou x = 5/3
x² - x - 2 = 0 => x² - 2x + x - 2 = 0 => x(x-2) - (x - 2) = 0 => (x-2)(x-1) = 0 
=> x = 2 ou x = 1