Réponses

2014-02-03T17:12:48+01:00
(3-a)²=9-6a+a²
(4a-5)²=16a²-40a+25
(6-7a)²=36-84a+49a²
(8a-9)²=64a²-144a+81
  • Utilisateur Brainly
2014-02-03T17:12:49+01:00