Q: How do you you undo the square root of a number?

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The square root is the number which is times by itself, to get the square number.

the square root of a number is the number that is multiplied by itself to get that number, for example the square root of 9 is 3

Nothing. You cannot have a square root of a negative number. The square root of negative one is called i, but i is an imaginary number. It does not exist and does not follow the properties of real numbers. (For example, if a and b are positive, then the square root of a times the square root of b is the square root of ab. But the square root of -7 is not the square root of 7 times i.)

The square root of a negative number is not real.

The square root of the number 23 = ± 4.795832

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square it

The square root is the number which is times by itself, to get the square number.

To square a number, you multiply it times itself, for example 3^2 = 3x3 = 9. To "undo" the squaring of a number, you determine its square root. In this case, the square root of 9, or √9. If the number is a perfect square, then the answer is the number that you have to square to get the number under the radical, √. For instance, √9 = 3 because 3^2 = 3x3 = 9. For numbers that are not perfect squares, or for any other number that you find difficult to work with, use your calculator. Different calculators have different keys and instructions, so you should read the instructions that came with your calculator, or look up the instructions online.

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).

3 is the square root of 9. 9 is a square number. 9 is the square root of 81. 81 is a square number.

the square root of a number is the number that is multiplied by itself to get that number, for example the square root of 9 is 3

Nothing. You cannot have a square root of a negative number. The square root of negative one is called i, but i is an imaginary number. It does not exist and does not follow the properties of real numbers. (For example, if a and b are positive, then the square root of a times the square root of b is the square root of ab. But the square root of -7 is not the square root of 7 times i.)

It's not a square if it has no root. If a number is a square then, by definition, it MUST have a square root. If it did not it would not be a square.

The square root of 25 is 5 ... rational.

The number 3 is the square root of the number 9 !

No - a natural number is a whole number. Therefore, the square root of 49 is a natural number, but the square root of 50 is not.

The square root of 51 is an irrational number and it is about 7.14128429