Réponses

2013-10-30T21:58:13+01:00
A = (x-1)+(2x-3)(x+5)
   =(x-1)+(2x²+10x-3x-15)
   = x-1+2x²+10x-3x-15
  = 2x²+8x-16
B = (x+3)(x-4)-3(x-2)
   =(x²-4x+3x-12)-3x+6
   =x²-4x-6
2013-10-30T21:58:18+01:00
Bonsoir

A = (x-1)+(2x-3)(x+5)
A = x-1 + (2x² +10x -3x -15)
A = x -1 +2x² +10x -3x -15
A = 2x² +8x -16


 B= (x+3)(x-4)-3(x-2)

B = (x² -4x +3x -12) - (3x-6)
B = x² -x -12 -3x +6
B = x² -4x -6