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What is the square root of 4?

10 Answers
this is my new question: what is the square root of 4?, thanks collaborators
C


There are two numbers which can be the square root of 4. However, let us first recall what it means for a number x to be the square root of a number k.

It means that if you square x you will get k.

In the case of 4, we can easily see that if we square 2 we will get 4, so 2 must be a square root. However, if we square -2, we can immediately see that we also get 4, Aha! so -2 must also be a square root of 4.

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K

Hello,
A square root of a number is a number, that when mulitplied by itself, equals the first number. An example is the square root of 49, which is 7, because 7*7=49. To answer your question, the square root of 4 is 2, because 2*2=4. Hope I helped!

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G

It's 2 and -2.
However, by convention, 2 is normally the only answer given (ie 'square root' is often taken to be 'positive square root' by default).

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J

-2 x -2 = 4 or
2 x 2= 4
So -2 is a square root of 4.
Also, 2 is a square root of 4.

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L

The square root is the opposite of squaring something. So, 2x2 or 2^2 = 4. so sqrt(4) = 2.

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L

There are two answers; the "principal root" of 4 is 2. The other root is -2.

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A

The square root of 4 is 2 and -2.
since 2*2= 4
and -2*-2 =4

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F

The square root of 4 is both 2 and -2.

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S

2 or -2

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S

Two!

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