Help with Review of Radicals?

Question

Ok, I have begun review to get ready for this years Calculus at University.
I have forgotten how to rationalize the denominator when there is three terms. Can someone help me? Can I do conjugates when there are three terms?

Here is the question:

_____1_____
1+ _/3 - _/5

sorry if that is unclear. The bottom is one plus root 3 minus root 5

Answer 1

First multiply top and bottom by

(1+sqrt(3)) + sqrt(5)

Once you do that, you'll have in the denominator

-1 + 2sqrt(3)

Again multiply top and bottom by -1 - 2sqrt(3) and you'll have you answer.

Answer 2

WOW, I've only rationalized with two terms