`(sqrt(7)-sqrt(5))/(sqrt(7)+sqrt(5))+(sqrt(7)+sqrt(5))/(sqrt(7)-sqrt(5))` is equal to :

(sqrt(3)-sqrt(5))(sqrt(3)+sqrt(5))/(sqrt(7)-2sqrt(5))

(sqrt(5)+sqrt(3))(sqrt(7)-sqrt(3))

show that (sqrt(7)-sqrt(5))/(sqrt(7)+sqrt(5))times(sqrt(7)-sqrt(5))/(sqrt(7)-sqrt(5)) =frac{(sqrt(7)-sqrt(5))^(2)}{2}

(2sqrt(7))/(sqrt(5)-sqrt(3))

Evaluate (sqrt(7)-sqrt(5))/ (sqrt(7)-sqrt(5))

(sqrt(7)-sqrt(5))^3 - (sqrt(7)+sqrt(5))^3

5/(sqrt(5)-sqrt(7))

(1)/(sqrt(2)+sqrt(5)-sqrt(7))

(sqrt7-sqrt5)/(sqrt7+sqrt5)