11.3 1)
3 5
−
4 5
= q
3 5
2 + −
4 5
2
= q9
25 +16
25 = q25
25 =√ 1 = 1
2)
−
1
√5
6
√45
!
= r
−
1
√5
2 +
6
√45
2
= q1
5 + 36
45 = q9
45+ 36
45 = q45
45 =
=√ 1 = 1
3)
2 3
−
1 3
−
2 3
= q
2 3
2 + −
1 3
2 + −
2 3
2
= q4
9 + 1
9 +4
9 = q9
9 =√ 1 = 1
Géométrie : norme Corrigé 11.3