Réponses

Meilleure réponse !
2014-02-08T18:56:43+01:00
2x(x-1)=-3x+3
2x² -2x =  - 3x +3
2x² - 2x +3x = 3
2x² +x = 3
x (2 +1) = 3
3x = 3
x = 1