Răspuns :
√8 + 2 / √8 - 2 =
(√8 + 2)² / (√8 - 2)(√8 + 2) =
8 + 4√8 + 4 / 8 - 4 =
12 + 4√8 / 4 =
4(3 + √8) / 4 =
3 + √8
(√8 + 2)² / (√8 - 2)(√8 + 2) =
8 + 4√8 + 4 / 8 - 4 =
12 + 4√8 / 4 =
4(3 + √8) / 4 =
3 + √8