What is the solution of √2x+4 -√x-2?

OK either the equation is  or   Either way it ends up the same because if it is the first equation, I would move the  to the other side of the equation.  It would become .

For my example, I am going with  
Square both sides
2x+4=
Then use FOIL to solve the right side
2x+4=
Then combine like terms
2x+4=
Set it equal to 0 and combine like terms

0=x(x-2)
So x=0 and x=2
If it was the other was it would be x=-2

Hope that helps.