Réponses

  • Utilisateur Brainly
2014-03-09T14:41:21+01:00
(2x+1)(-4x-1)+(2x+1)(8x+4)
=(2x+1)(-4x-1+8x+4)
=(2x+1)(4x+3)
=8x²+10x+3
  • Utilisateur Brainly
2014-03-09T14:43:42+01:00
G=(2x+1)(-4x-1)+(2x+1)(8x+4)
G=-8x²-2x-4x-1+16x²+8x+8x+4
G=-8x²+16x²-2x-4x+8x+8x-1+4
G=8x²+10x+3