# What is the square root of 4?

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Does anyone know what the answer to this? I do not even know what a square root is!

answered Mar 22 by (91,750 points)
answered Mar 22 by (24,100 points)

Hi, what grade are you in? Anyways, the square root of 4 is 2. Let me explain to you what a square root is. You see, square roots are similar to division. Let's take 9 for example, now, what two numbers multiply into 9. 3? Right, see, 3 x 3 = 9. And, the square root of 16 is, 4, right? Well, because, 4 x 4 equals 16. Those two numbers equal 16. And lets say, maybe you think the square root of 16 is 8, but that can't be possible because 8 x 2 = 16. Sure, that's correct, but are 8 and 2 the same numbers, do they equal the same? Of course not! 4 and 4 are the same numbers, that's why they equal 16. So, the square root of 4 is 2, because, again, 2 numbers equal 4? 2!

commented Mar 22 by (133,320 points)

Another way to describe it-

Square roots are the opposites as exponents. Exponents are a number multiplied by itself a certain number of times. Exponents are also the little numbers in the corner. 42 is an exponent, it means 4 x 4. Since 4 x 4 = 16, then 42 = 16.

Now, square roots mean the opposite. A square root looks like a check.  √4 means the square root of four, or 4 ÷ *number* = *same number*. Now, square roots are hard to explain without knowledge of exponents, but the square root of 4 is 2 because four divided by 2 equals also 2.

Substituting numbers for variables (letters), a ÷ b = b.