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Sometimes. eg the irrational number √2 squared is 2 which is rational (2 = 2/1) eg the irrational number √(√2) squared is √2 which is irrational.
5 squared is 5*5 is 25. 25 is not an irrational number.
Irrational numbers are precisely those real numbers that cannot be represented as terminating or repeating decimals. Log 216 = 2.334453751 terminates and is therefore not irrational.
Because it has no number that can be squared to make it.
No because 102 squared is 10404 which is a rational number