Solving $2\left(\sqrt{2s-16}-\sqrt{s}\right)-8=0$ I am trying to solve the equation 
$$2\left(\sqrt{2s-16}-\sqrt{s}\right)-8=0$$ 
Using regular method I found two roots of this namely $32(2+\sqrt{3})$ and $32(2-\sqrt{3})$. But when I tried to confirm them only $32(2+\sqrt{3})$ worked as a root whereas $32(2-\sqrt{3})$ gave me negative value. 
Can someone help with this?

The domain is $s\geq8$, but $32(2-\sqrt3)<8$, which says that $32(2-\sqrt3)$ is not a root of the equation.
