Réponses

2014-01-27T20:56:19+01:00
Bonsoir

C=3(x-2)+2(1-3x)
3x² -6 +2 - 6x = 3x² -6x -4

D=x(x-3)-5x(4+x)
x² -3x -20x - 5x²
-4x² -23x

2014-01-27T21:12:30+01:00
C=3(x-2)+2(1-3x)
C = 3x² - 6 +2 - 6x
C = 3x² -6x -4

D=x (x-3) - 5x (4+x)
D = x² -3x - 20 x - 5x²
D = -4x² -23x