Question 1071879
Start by dealing with the constants, which here are sqrt(5/2)
that will rationalize to 5*sqrt(2)/2
then deal with the first variable.  That is x^4/x^2, which is x^2, and the sqrt (x^2)=x
then the second variable, which is sqrt(y/y^3) or sqrt (1/y^2) which is (1/y)
then combine all the parts
5 sqrt (2)*x/y