Réponses

2014-02-17T17:00:27+01:00

8x² - 16x +4x -8 = 8x²
8x² - 8x² - 12 x = 8
-12x = 8
x = -8/12
x = - 2/3

b) 


6x + 2x² -12 -4x -2x² = 5x -6
6x -4x -5x = -6 +12
2x = 6
x =3