Réponses

  • Utilisateur Brainly
2013-11-17T16:10:19+01:00

A= (x-5)(3-2x)
  =3x-15-2x²+10x
  =-2x²+13x-15

B=(3x+5)au carré -2(15x+9)

 =9x²+30x+25-30x-18
  =9x²+7
2013-11-17T16:13:17+01:00
A= (x-5)(3-2x)
=3x-2x²-15+10x
=-2x²+13x-15

B=(3x+5)²-2(15x+9)
=9x²+30x+25-30x-18
=9x²+7