Réponses

2013-09-24T21:53:31+02:00
E=(2x-3)(x+1)-(x-4)(3x-1)= (2x²-3x+2x-3)-(3x²-12x-x+4)=2x²-3x+2x-3-3x²+12x+x-4)= -x²+12x-7