9514 1404 393
Answer:
any of -9, 9i, -9i
Explanation:
The value of (3^2)^4 = 3^8 = 6561. This number has four 4th roots, two of which are imaginary.
6561^(1/4) = 9, -9, 9i, -9i
Thus (3^2)^4 is the 4th power of any of 9, -9, 9i, -9i. In any of these, 9 can be expressed as 3^2 or (-3)^2, if you like.