Réponses

  • Utilisateur Brainly
2013-12-01T14:37:42+01:00
Factoriser (3y-5)(2y+1)+(y-7)(15-9y)
=(3y-5)(2y+1)+3(y-7)(5-3y)
=(3y-5)(2y+1-3(y-7))
=(3y-5)(-y+22)