Answer:
Part A: 0
Part B: All real numbers
Explanation:
Part A:
We have:

First, let's evaluate the square:

Now, what to the xth power will equal 1?
Remember the fact that anything (except for 0) to the zeroth power is 1.
Therefore, our x is 0:

Part B:
We have:

Like mentioned previously, anything to the zeroth power is 1. Thus:

Now, 1 is a special base because 1 to any (real) power is still going to be 1. For example:

Therefore, our values of x is all real numbers.
And we're done!