Find the possible square roots of the two-rowed unit matrix I.

If [(alpha,beta),(gamma,-alpha)] is to be square root of the two rowed unit matrix , then alpha , beta and gamma should satisfy the relation :

Find the square roots of the following: -i

Find the square roots of the following: -i

Find the square roots of the following: i

Find the square roots of the following: i

Find the square root of the following: i

Find the square root of the following: i