(iii) find the value `(2+sqrt5)(2-sqrt5)`

Find the value of 5/(sqrt11-sqrt7)

4.Find the value of "1/(sqrt5+sqrt2)

Using binomial theorem, expand {(x+y)^5+(x-y)^5}dot and hence find the value of {(sqrt(2)+1)^5+(sqrt(2)-1)^5}dot

Rationalize the denominatior and simplify to find the value of (4)/(sqrt(5) + sqrt(3)) (Given : sqrt(5) = 2.236 and sqrt(3) = 1.732)

Rationalize the denominator and simplify to find the value of 4/(sqrt(5)+sqrt(3)) , given that sqrt(5)=2.236 and sqrt(3)=1.732

Find the square of : sqrt(5)-2

Find the value of sqrt(5) correct to 2 decimal places, then use it to find the square root of (3-sqrt(5))/(3+sqrt(5)) correct to 2 significant digits.

If x= ( sqrt5- sqrt3)/ ( sqrt5+ sqrt3) and y= ( sqrt5+ sqrt3)/( sqrt5- sqrt3) find the value of x^(2) + y ^(2)

If (2+sqrt(5))/(2-sqrt(5)) =x and (2-sqrt(5))/(2+sqrt(5)) =y , find the value of x^(2)-y^(2) .

Find the value of 6/(sqrt(5)-\ sqrt(3)) , it being given that sqrt(3)=1. 732\ \ a n d\ \ sqrt(5)=2. 236