Question 19929
Rationalise the denominator:
 {{{2/(9-sqrt(6))}}} Multiply top & bottom by the conjugate of {{{9-sqrt(6)}}} and that's {{{9+sqrt(6)}}}
{{{2/(9-sqrt(6))*(9+sqrt(6))/(9+sqrt(6)) = (2(9+sqrt(6)))/(81-6)}}} = {{{(18+2sqrt(6))/75}}}