Réponses

  • Utilisateur Brainly
2013-05-08T20:26:51+02:00

5x + 2x = 7x vrai

5x + 2x =7x² faux = 7x

5+2x=7x faux = 5+2x

3x² -3x + 7x - x²=2x²+4x  vrai

3a-6a + 6ab+3a+4ab=4a+10b faux

-3a +6ab +3a +4ab =10ab