Simplify the radical expression. Show all your steps.

root of 363 - 3 root of 27

√363 - 3√27

√(121*3) - 3√(9*3)
11√3 - 3(3√3)
11√3 - 9√3
(11-9)√3
2√3

Therefore, √363 - 3√27 simplifies to 2√3.