" If "sqrt(x)-sqrt(y)=1" and "sqrt(x)+sqrt(y)=17," then "sqrt(xy)=?

If sqrt(x)+sqrt(y)=17 and sqrt(x)-sqrt(y)=1, then the value of is sqrt(xy)

x+sqrt(xy)+y=1

(sqrt(x)-sqrt(y))(sqrt(x)+sqrt(y)) = ……………..

Evaluate (sqrt(x)+sqrt(y))(sqrt(x)-sqrt(y))

(sqrt(x)+sqrt(y))^(2)=x+y+2sqrt(xy) and sqrt(x)sqrt(y)=sqrt(xy) , where x and y are positive real numbers . If x=2sqrt(5)+sqrt(3) and y=2sqrt(5)-sqrt(3) , then x^(4)+y^(4) =

If 0

If 0 (a) sqrt(x)-\ sqrt(y)=\ sqrt(x-y) (b) sqrt(x)+\ sqrt(x)=\ sqrt(2x) (c) xsqrt(y)=ysqrt(x) (d) sqrt(x y)=\ sqrt(x)\ sqrt(y)