Evaluate :

`( sqrta - sqrtb   ) ( 1/sqrta + 1/sqrtb )`

(sqrta + sqrtb)^2 = ?

(a + b)(sqrta + sqrtb ) (sqrta - sqrtb)= "________"

sqrt(a +b -2 sqrt(ab)) is ____ where sqrta gt sqrtb

If x = (4 sqrt(ab))/(sqrt a + sqrt b) , then what is the value of (x + 2sqrt a)/(x - 2 sqrta) + (x + 2 sqrtb)/(x - 2 sqrt b) " (when " a ne b) ?

Evaluate : lim_( x -> 0 ) (( 1 - sqrt(1 - x^2 ) ))/ x^2 ( a ) 1/2 ( b )   2   ( c )   1   ( d )   -1

Evaluate : lim_( x -> 0 ) (( 1 - sqrt(1 - x^2 ) ))/ x^2 ( a ) 1/2 ( b )   2   ( c )   1   ( d )   -1

Evaluate : lim_( x -> 0 ) ( sqrt( x^2 + 1 ) -x ) = ? (a)   1   ( b )  -1   ( c )   0