5^ 1 x 5^ 1/2 = 5^ 1 1/2 = 5^ 3/2

Or the square root of 5 ...cubed = (root 5)^3

5^(3/2)

or

5^(1.5)

5^1 * 5^(1/2)

5^(2/2) * 5^(1/2)

5^(3/2)