Answer:

1. there is always an odd exponent. So it could not have been made by squaring a rational number! This means that the value that was squared to make 2 (for example the square root of 2) cannot be a rational number. In other words, the square root of 2 is irrational

2. If a square root is not a perfect square, then it considered an irrational number. These numbers cannot be written as a fraction because the decimal does not end(non-terminating) and does not repeat a pattern (non-repeating).