Réponses

  • Utilisateur Brainly
2013-11-01T17:59:56+01:00
A=(4x+1)(x-4)-4x(1-5x)
  =4x²-16x+x-4+20x²-4x
  =24x²-19x-4

B=2x(3x-1)-(1-4x) (1/2x+1)

  =6x²-2x-(-2x²+1+1/2x-4x)
  =8x²+3/2x-1