Réponses

  • Utilisateur Brainly
2014-09-22T20:08:38+02:00
5d + 4d
= 5 x d + 4 x d
= d(5 + 4)
(= 9d)

6b + 12
= 6 x b + 6 x 2
= 6(b + 2)

16a + 8
= 8 x 2a + 8 x 1
= 8(2a + 1)

12b - 12
= 12 x b - 12 x 1
= 12(b - 1)