The square root of 4 is indeed a rational number. To understand why, let’s first define what a rational number is.
A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero. In simpler terms, a rational number can be written in the form p/q, where p and q are integers and q ≠ 0.
The square root of 4 equals 2 because 2 multiplied by itself (2 x 2) gives us 4. Since the number 2 can be expressed as the fraction 2/1, it meets the definition of a rational number.
Additionally, rational numbers include integers, fractions, and terminating or repeating decimals, all of which 2 represents. Therefore, the square root of 4 is not just a rational number; it is a whole number as well.