Réponses

2014-05-25T12:48:41+02:00
B=(√17-1)(√17+1) = 17 - 1 = 16
C = 
(3-√7)² = 9 - 6√7 +7 = 16 - 6√7
D = 16 - 16 + 6√7 = 6√7
voilà mon coco