5/2 to the second power means 5/2 squared. "Squared" means multiplied by itself. We would write this as (5/2)2. This means (5/2) * (5/2). 5/2 * 5/2 = 25/4 = 6.25.
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1 over 5^2. which is 1/25
(2^5)/2 - (2^(3/2)) = 12
(-5)2 = 25
It is: 5^2 = 25
5 to the second power = 5*5 = 25