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The square root of 4 is 2 which is a rational number
The square of number is a *a ( a number times itself ). For example, 4*4=16, so the square of 4 is 16. the square root is the number before you square it. The square root of 16 is 4. It actually simple to remember this way: think of the root as the root of a tree, growing to multiply itself.
The square root of -1 is the imaginary number i.So the square root of -4 = 2i
The square root of 16 is ±4 which is the rational number ±(4/1)
Yes. The square root is 2.