Réponses

2013-10-29T17:05:24+01:00
2013-10-29T17:05:58+01:00
A=3(x-2)+5(3-x)
 = 3*x -2*3 +5*3 -x *5
  = 3x -6 +15 -5x
  = 3x - 5x -6 +15
  = -2x + 9