Réponses

2012-10-17T19:16:32+02:00
2012-10-17T19:23:53+02:00

5(x²-2x+1)-3(x-1)

= 5(x-1)²-3(x-1)

= (x-1)(5(x-1)-3)

= (x-1)(5x-5-3)

= (x-1)(5x-8)

 

En espérant t'avoir aidé.