Réponses

  • Utilisateur Brainly
2013-10-27T19:00:33+01:00
-7(3x-1)-(6x-2)(x-4)+(2x-1)²
=-21x+7-(6x²-24x-2x+8)+(4x²-4x+1)
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x

CORRECT !
2013-10-27T19:01:08+01:00
-7(3x-1)-(6x-2)(x-4)+(2x-1)²
=-21x+7-(6x²-24x-2x+8)+4x²-4x+1
=-21x+7-6x²+24x+2x-8+4x²-4x+1
=-2x²+x

donc, tu as juste :)