Réponses

2012-10-12T17:10:14+02:00

A=(8x*2x+8x*(-4)+(-1)*2x(-1)*(-4))-(5x)²-2*3*5x+3²

 

  = 16x²-24x-2x+4-25x²-30x+9

 

  = -9x²-56x+13