1)-2,82843
2)4
_____ _______ _________
3)√9+√65 √9-√65. √(9+√65)×2
------------ +. --------------- = ---------------------- +
√2. √2. 2
__________ ________ ________
√ (9-√65)×2. √18+2√65. √18-2√65
+ ------------------- = ----------------- + -----------------
2. 2. 2
=3,60555