Réponses

2014-10-05T15:23:22+02:00


Salut,

voici tes calculs :

3(x + 1) = 3x + 3

2(x - 3) - 3(2x + 1) = 2x - 6 - 6x - 3 = -4x - 9

-(x + 1) + (x - 2) = -x - 1 + x - 2 = -3

3 + 2x² - 16x - x² + 10x - 9 = x² - 6x - 6

A+