LMN is a right angled triangle with M being the right angle
LN=(√27+√12)
MN=(√18+√8)
Show that MN=5cm
=(√27+√12)^2 - (√18+√8)^2 =(MN)^2
= 75 - 50 = (MN)^2
(MN)^2 = 25 take the sqrt of both sides
MN = 5 cm.