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Q: Is negative square root of 21 irrational?

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It is: 2 times the square root of 21 and it's an irrational number

It is equal to 21/2 which is a rational number

the square root of 21

The square root of 21 is 4.58257569495584.

21

Related questions

irrational

No. The square root of an integer is either an integer, or an irrational number.

irrational, it has a never ending decimal

0.8095

It is: 2 times the square root of 21 and it's an irrational number

Yes. The square root of a natural number (positive integer) is either an integer, or an irrational number.

It is equal to 21/2 which is a rational number

the square root of 21

No because it is 2 times the square root of 21 which is an irrational numberThe square root of 84 is not a rational number

the square root of 21

Yes, albeit an irrational number

The square roots of 21 are 4.5826 (rounded) and the negative of the same number.

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