Réponses

  • Utilisateur Brainly
2013-08-31T08:53:11+02:00
A = (x+5)² - (2x-1)² + (3x + 4)² (x-1)
   =(x+5-2x+1)(x+5+2x-1) +
(3x + 4)² (x-1)
   =(-x+6)(3x+4)+(3x + 4)² (x-1)
  =(3x+4)(6-x+(3x+4)(x-1))
  =(3x+4)(3x²+2)