Evaluate :
`( sqrt(a) + sqrt(b) ) ( sqrt(c) + sqrt(d) ) `

Evaluate : ( sqrt(a) + sqrt(b) ) ( sqrt(a) - sqrt(b) )

Evaluate : sqrt(a) times sqrt(b)

Evaluate : ( -b/a ) / sqrt( b/a ) + sqrt(b)/ sqrt(a ) = ?

Let a,b,c,d,A,B,C,D in R . If A/a = B/b = C/c = D/d then (sqrt(Aa) + sqrt(Bb) + sqrt(Cc) + sqrt(Dd)) / (sqrt(a+b+c+d) sqrt(A+B+C+D))=

Evaluate : Find the value of sqrt( 3 + sqrt(5)) a ) sqrt(3)/2 + 1/sqrt(2) b ) sqrt(3)/2 - 1/2 c ) sqrt(5)/2 - 1/sqrt(2) d ) sqrt(5)/sqrt(2) + 1/sqrt(2)

If a and b are positive natural numbers (sqrt(a)+sqrt(b))(sqrt(c)+sqrt(d))=sqrt(ac)+sqrt(ad)+sqrt(bc)+sqrt(bd)

In /_\ABC ,the minimum value of Sigma((sqrt(a))/(sqrt(b)+sqrt(c)-sqrt(a))) is

The conjugate surd of sqrt(a)+b is sqrt(a)-b b- "sqrt(a) sqrt(a)+sqrt(b) sqrt(a)-sqrt(b)

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.