Réponses

Meilleure réponse !
2012-09-09T11:37:46+02:00

[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3

[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30

[8x-7][12-3x]=96x-24x-84+21x=93x-84

 

2012-09-09T11:44:47+02:00

[3x-1][2x+3]=6x*2+6x-2x-3=6x*2+4x-3

 

[x-5][x-6]=x*2-6x-5x+30=x*2-11x+30

 

[8x-7][12-3x]=96x-24x-84+21x=93x-84