Réponses

2013-11-03T00:57:15+01:00
C = (3x-1)(3x+1)(x-6)
= (3x*3x + 3x - 1*3x -1)(x-6) 
= (9x² + 3x - 3x -1)(x-6)
= (9x² -1)(x-6)