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.
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The square of a rational number can be either rational or irrational. However, the square of an irrational number is always irrational.
It is an irrational number
irrational
It is irrational.
It is an irrational number