Réponses

2014-02-04T21:27:01+01:00
A = 4-(5x+1)•
= 4- (5x•+2x5xx1 + 1•)
= 4-(25x•+10x+1)
= 4-25x•-10x-1
= 3-25x•-10x

le • correspond au carre