Hi,I'm confused as to this equation:

$\displaystyle y=\sqrt{-y+2}$

How exactly can I shift all the variables to 1 side and remove the root?

If I try multiplying the whole equation by the root, I get a root on the left while if I multiply a root for the 2nd time, I get a root on the right.

So how exactly can I get rid of the root?