Réponses

  • Utilisateur Brainly
2014-04-17T06:56:31+02:00
X²-x²-1

(1+V5)/2 - (1+v5)/2 - 1 =

(1+2V5+5)/4 - (1+v5)/2 -1 =

(6+2V5)/4 - (1+v5)/2 - 1 =

(3+V5-1-V5-2)/2 = 0