Question

-2√7 rational or irrational?

Answer 1

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

Answer 2

Answer

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

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.