4√12- √108-2√75 4√(4*3) -√(36*3) - 2√(25*3)
------------------------ = ----------------------------------------- =
2√18+ 5√8-√128 2√(9*2)+ 5√(4*2) -√64*2
8√3 - 6√3 - 10√3 √3(8 - 6 - 10) -8√3 √3
= ---------------------------- = -------------------- = --------- = - --------
6√2+10√2 - 8√2 √2(6 +10 - 8) 8√2 √2