Réponses

  • Utilisateur Brainly
2014-03-17T15:34:26+01:00
Bonjour,

(5-3V6)² =
 25-30V6+54 =
-30V6+79

(2+v3)(2-V3) = (a-b)(a+b) =a²-b² = 4-3 = 1