Question

Which of the following is a rational number?

square root of 2, square root of 3, square root of 4, and square root of 5

Answer 1

`√(4)` is rational

Explanation:

A rational number can be expressed in the form

`(a)/(b)` ← where a and b are integers

`√(4)` = ± 2 , and

`(2)/(1)` ,
`(-2)/(1)` are both rational

`√(2)`,
`√(3)` ,
`√(5)` cannot be expressed in this form and are irrational