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The square roots of 2.25 are -1.5 and 1.5: rational numbers.

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Is the square root of 4 irrational or rational?

It is rational. The root of a perfect square, such as 4, is rational; the root of any positive integer that is not a perfect square is an irrational number.


What does the mathematical term perfect square mean?

The mathematical term 'perfect square' means that a number, which has a rational number as its square root. 25 is a perfect square, because its square root is 5, a rational number.


How can you tell whether a square root of a whole number is rational or irrational?

If the whole number is a perfect square, its square root is rational. If not, it's not.


A rational number whose square root is a whole number?

A perfect square.


If x is a rational number is square root of x always irrational?

No. If 'x' is a perfect square, then its square root is also rational.


Which square root number is rational?

The square root of any perfect square, or a ratio of perfect squares. eg sqrt(9/25) = 3/5, is rational.


Why is square root of 9 a rational number and square root of 3 is an irrational number?

Because 9 is a perfect square - which means that its square root is an integer. 3 is not a perfect square.


Is the square root of a positive number an irrational number?

Sometimes the square root of a positive number can be irrational, as in the square root of 2 (which is a non-perfect square number), but sometimes it is a rational number, as in the square root of 25 (which is a perfect square number).


A short note on square root of rational number?

Square root of a rational number may either be rational or irrational. For example 1/4 is a rational number whose square root is 1/2. Similarly, 4 is 4/1 which is rational and the square root is 2 which of course is also rational. However, 1/2 and 2 are rational, but their square roots are irrational. We can say the square root of a rational number is always a real number. We can also say the rational numbers whose square roots are also rational are perfect squares or fractions involving perfect squares.


Is the square root of 32 a rational number?

No, because 32 is not a perfect square.


Is the square root of a15 a rational number?

No, because 15 is not a perfect square. The closest perfect square is 16, whose square root is 4.


Is the square root of 75 rational or irrational?

The square root of (any number that isn't a perfect square) is irrational.