Réponses

2012-09-18T21:12:31+02:00

2x-5(x+3)(x-2)

= 2x-5x²-2x+3x-6                j'utilise la double distributivité

=-5x²+3x-6                       

2012-09-18T21:15:02+02:00

2x-5+x*x-x*2+3*x-x*2 

1+xau carre-2x+3x-2x 

x au carre -1x+1