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The square root of -676 is 26i.
It is an irrational number and it is 12 times the square root of 26
5.99990
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.
It is an irrational number because it can't be expressed as a fraction