Réponses

2013-01-31T17:39:03+01:00
Salut x+2X2x-2X-3-x+1Xx-1X2 =x+4x-6-x+2x-2 =6x+4
Meilleure réponse !
2013-01-31T18:07:06+01:00

[(x+2)(2x-3)]-[(x+1)(x-2)]

=(2x²-3x+4x-6)-(x²-2x+x-2)

=2x²+x-6-x²+2x-x+2

=x²+2x-4