Réponses

2014-01-05T18:47:09+01:00
Bonsoir
a = (6x² +8x -9x -12) - (5x² +20x -6x -24)
a = 6x² -x -12 - 5x² -14x +24
a = x² -15x +12

b = 24x -32  -8x² +4x +48x -24
b = -8x² +76x - 56

c = 12( 3x² - 2)
d = (3x-1)( 2x-3) - (3x-1)
d = (3x-1)(2x-3 -3x +1)
d = (3x-1)( -x -2)

e = (3x +5)(5 - (-8x +1)
e = (3x-5)( 5 +8x -1)
e = (3x-5)(8x +4)