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!