Réponses

Meilleure réponse !
2014-09-14T18:10:07+02:00
A = (2x+4)(3x+5)
6x² +10x +12x +20
6x² +22x +20
B = (5x-7)(3x+1)
15x² +5x -21x -7
15x² -16x -7
2014-09-14T18:16:29+02:00
A=(2x+4)(3x+5)
  =6x²+10x+12x+20
  =6x²+22x+20

B=(5x-7)(3x+1)
  =15x²+5x-21x-7
  =15x²-16x-7