Question

-2√7 rational or irrational?

Answer 1

The sqrt(7) part makes it irrational, so the answer is irrational.

Answer 2

`-2\sqrt 7`
`\text {is an irrational number}`

Explanation

`-2\sqrt 7` is an irrational number, an irrational number is a number that contains repeating decimals or that cannot be written as a simple fraction.