(5sqrt(7)+2sqrt(7))(6sqrt(7)+3sqrt(7))

[(5sqrt(7)+sqrt(7))+)4sqrt(7)+8sqrt(7))]-(19)^(2)=?

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

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

Rationalise the denominator of (sqrt(7)-sqrt(6))/(sqrt(7)+sqrt(6))

1/(sqrt(7)+sqrt(3))\times (sqrt(7)-sqrt(3))/(sqrt(7)-sqrt(3))

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

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}

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

If a=(sqrt(7)-sqrt(6))/(sqrt(7)+sqrt(6)) and b=(sqrt(7)+sqrt(6))/(sqrt(7)-sqrt(6)), then find the value of a^(2)+b^(2)+ab