2(√11-2)- 7(√11 -3) 2√11 -4 -7√11 +21 16-5√11 (16-5√11)·(17+5√11)
--------------------------- = -------------------------- =-------------- = -------------------------=
(√11-3)(√11-2) 11-2√11-3√11+6 17 -5√11 (17 -5√11) (17+5√11)
272+80√11-85√11 -25·11 -3-5√11 3+5√11
=----------------------------------- =------------= - --------------- .
289-25·11 14 14