<PRE><B>Question 779886</B>
1/(sqrt(x-4)+sqrt(x-3))
----------
Multiply numerator and denominator by sqrt(x-4)-sqrt(x-3)
----------
= [sqrt(x-4)-sqrt(x-3)]/[sqrt(x-4)+sqrt(x-3)]*[(x-4)-(x-3)]
----------
= [sqrt(x-4)-sqrt(x-3)]/[(x-4)-(x-3)]
---------------
= [sqrt(x-4)-sqrt(x-3)]/(-1)
-----
= sqrt(x-3)-sqrt(x-4)
========================
Cheers,
Stan H.
===============</PRE>