It is irrational.
* The square root of any positive integer, except of a perfect square, is irrational.
* The product of an irrational number and a rational number (except zero) is irrational.
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It is an irrational number because it can't be expressed as a fraction
It is an irrational number and it is 12 times the square root of 26
26 is a rational number
The square root of -676 is 26i.
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