Réponses

  • Utilisateur Brainly
2014-09-28T11:38:11+02:00
7² = 7 x 7 = 49
4² = 4 x 4 = 16

49 x 16 = 784

28² = 28 x 28 = 784
2014-09-28T12:23:14+02:00
= 7² x 4²
= ( 7 x 7 ) x ( 4 x 4 )
= 49 x 16
= 784

= 28²
= 28 x 28
= 784