Question

An example of irrational numbers is
the square root of -17
square root of 16
square root of -9***
square root of 1

Answer 1

An irrational number cannot be expressed as a ratio between two numbers and it cannot be written as a simple fraction because there is not a finite number of numbers when written as a decimal. Instead, the numbers in the decimal would go on forever, without repeating.

Answer 2

None of the above are irrational numbers.
irrationals are a subset of the reals
-17 and -9 do not have real square roots
16 and 1 are perfect squares, so their roots are integers

I suspect a typo. Irrationals are things like
√17, π, etc.

Answer 3

Answer is square root of -17!!