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What is the the positive square root of a number indicated by the radical sign?
It is the principal square root.
Can a natural number be a square root?
Yes. For example, 3 is the [principal] square root of 9.
When a number is even is the root even too?
The square root of an even number can be an even number (if it is a perfect square), or an irrational number (if it is not).
How do you find the two square roots in a number?
Use a calculator (if you need) to find the principal square root. The second square root is the negative of the number.
What is the principal root of -25?
The principal root of a number is the positive real square root of the number - if it exists. Since -25 is negative, it does not have a real square root. Its square roots are the imaginary numbers +/-5i where i is the [imaginary] square root of -1. i is neither positive nor negative and so neither +5i nor -5i is a principal root.
What is the principal square root of 9?
The principal square root of 9, the positive integer which is the square root of the number, is 3.
Every positive number has two square roots what are they?
The principal square root is a positive number which, when multiplied by itself, gives the original number. The second square root is the negative of the principal square root. So, for example, starting with 144. The principal square root is 12 because 12*12 = 144 and the second square root is -12.
What is the principal square root of a positive number?
A positive number has two square roots, that is, there are two solutions to an equation like x2 = 100. The "principal square root" refers to the positive solution.
What is a principal square root?
The principal square root is the non-negative square root.
What is the the positive square root of a number indicated by the radical sign?
It is the principal square root.
What would be of the square root of a number if there is no sign in front of the square root symbol?
If unspecified, the square root is the principal root, which is the positive root.
Can a natural number be a square root?
Yes. For example, 3 is the [principal] square root of 9.
What is the principal root of 10?
The principal (square) root of 10 is an irrational real number which equals approximately 3.16227766.
How do you reverse a square root?
The opposite of a square root is the square of a number. For example, the principal square root of 81 is 9, while the square of 9 is 81.
When a number is even is the root even too?
The square root of an even number can be an even number (if it is a perfect square), or an irrational number (if it is not).
How do you find the two square roots in a number?
Use a calculator (if you need) to find the principal square root. The second square root is the negative of the number.
What is the principal square root of x?
Restricting the discussion to real numbers for now. In this case, the square root is only defined for non-negative numbers; the principal square root of a positive number is the POSITIVE square root. For example, both +5 and -5 are square roots of 25, since both - when squared - give you 25. But the positive square root (+5) is called the principal square root, and if you write the square root symbol, that's the number usually meant.
