將下列二次根式化為最簡二次根式:根號[2 / 5(x+y)](x>0,y>0)

將下列二次根式化為最簡二次根式:根號[2 / 5(x+y)](x>0,y>0)

根號[2 / 5(x+y)]
=根號{2*5(x+y)/[5(x+y))^2]}
=[根號10(x+y)]/(5(x+y))