Question 987432
{{{sqrt(8)/(sqrt(7)+sqrt(9))}}}
{{{(sqrt(8)/(sqrt(7)+sqrt(9)))((sqrt(7)-sqrt(9))/(sqrt(7)-sqrt(9)))}}}
Takes advantage of Difference of Squares
{{{sqrt(8(sqrt(7)-sqrt(9)))/(7-9)}}}
{{{sqrt(8sqrt(7)-8sqrt(9))/(-2)}}}
{{{highlight(-sqrt(8sqrt(7)-8sqrt(9))/2)}}}