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No, it is rational.

Q: Is 225 irrational

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The square root of 225 is 15, which is NOT an irrational number.

-225 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

225/7 is an irrational decimal, so 225 is not a multiple of 7.

It is 15 which is a rational number

Neither, it is an imaginary number and imaginary numbers are neither rational nor irrational.

No, the best way to figure this out is to plug into a scientific calculator and if the answer you get has a square root around you know its irrational.

-225 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.

Because some of them are squares of rational numbers. So their square roots are the rational numbers.Thus if x is rational, then the square roots of x2, which are -x and +x are both rational.

If you mean the square root of 196/225 then it is 14/15 which is a rational number because it can be expressed as a fraction.

Irrational. Irrational. Irrational. Irrational.

no square root of 9 is 3 which is rational -- to be more specific: an irrational number is a number that cannot be expressed as a fraction. Pi, for example, is one of these numbers. If a number is not a perfect square (4, 16, 9, 144, 225, etc.), then it's square root is likely to be an irrational number. For example, the square root of 2 (1.41421356...) is an irrational number because it cannot accurately be expressed as a fraction.

It is irrational.