Question 82530
 
{{{9/(5-sqrt(7))}}} First, multiply the numerator and denominator by the denominator's conjugate {{{(5+sqrt(7))}}}.  This will get rid of the radical in the denominator.

{{{9(5+sqrt(7))/(25-7)}}} simplify

{{{(45+9sqrt(7))/18}}}  divide both numerator and denominator by 9

{{{(5+sqrt(7))/2}}}----------------answer

CK by using a calculator

Hope this helps----ptaylor