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Q: Is 3 squared a rational or irrational?

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They are rational.

20 squared is 400 which is a rational number

Rational.

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.

-90 squared is rational - it is +8100. All perfect squares are not only rational but they are integers.

Related questions

They are rational.

Rational

28 squared is 784 which is a rational number

20 squared is 400 which is a rational number

Rational.

Rational.

No, it is rational.

No, it is rational.

Rational; 62 = 36. Any rational number that is squared is still rational.

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.

20 squared is 400 which is a rational number

-90 squared is rational - it is +8100. All perfect squares are not only rational but they are integers.

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