Because there are no integers x and y tat are coprime, such that x/y = sqrt(62). The proof requires knowledge of the unique prime factorisation theorem. If you know that theorem, you will have also learned why sqrt(62) is irrational. And if you have not, this site is not best suited to learn about the theorem.
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irrational
irrational
It is a irrational number. Because the square root of every imperfect square is irrational number.
Yes, square root of 33 is irrational.
The square root of 254 can be said to be irrational.