Réponses

  • Utilisateur Brainly
2014-03-07T14:41:03+01:00
A = √5(1-√5) 
=V5-5

B=(2+3√5)√5 
=2V5+15

C=(3-2√5)(3√5+4)

=9V5-30+12-8V5
=-18+V5