2 is not a root.
There are three ways that an expression A raised to another expression B can be 0.
One way is if A is 0 at a location that B is not also 0. You can solve this by finding the roots of A and cross checking whether they are also roots of B.
A second way is if the A has a value with absolute value strictly less than 1 while B is positive infinity. This cannot occur with pure polynomials: they always go to infinity only at +/- infinity so at any location where B is infinite, A would be as well.
A third way is if A is absolute value strictly greater than 1 and B is negative infinity. This cannot occur in this particular case as B cannot be negative infinity, but it could occur with other polynomial B.
We can see that only the first case applies for these expressions, so find the roots of A as usual. 2 is not one of them.