Réponses

2013-12-20T18:01:37+01:00
Bonsoir
f(x) = (x-1)^3 -(x+1)(x-1)² -(x-1)(1-2x) 
f(x) = (x-1) [ (x-1)² - (x+1)(x-1) - (1-2x) ]
f(x) = (x-1) ( x² - 2x +1 - x²+1 - 1 + 2x) 
f(x) = (x-1)( 1) 
f(x) = x-1