Evaluate :
`( sqrt(11) - sqrt(7) )( sqrt(11) + sqrt(7) )`

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

Evaluate : ( sqrt(3) + sqrt(7) ) times ( sqrt(3) + sqrt(7) )

Evaluate : ( sqrt(7) + sqrt(5) ) ( sqrt(5) - sqrt(7) )

Evaluate : ( sqrt(7) + sqrt(2) ) times ( sqrt(3) + sqrt(8) )

Which of the following is the value of (sqrt(11)-sqrt(7)) (sqrt(11) + sqrt( 7)) ?

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

Evaluate : ( sqrt(7) - 6 ) times ( sqrt(3) - sqrt(7) )

If a and b are rational numbers and (sqrt(11)-sqrt(7))/(sqrt(11) +sqrt(7))=a - b sqrt(77) . find the value of a and b.

Simplify (sqrt(11)+sqrt(8))(sqrt(11)-2sqrt(2))

Evaluate (sqrt(7)-sqrt(2))(sqrt(5)+sqrt(2))