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kvadratni koren
In mathematics, if x2 = y, then x is a square root of y. Square roots are expressed by a 'radical sign'.
The square root of any number x2 is x. The square root of 2 is not a whole number but is approximately 1.414.
Actually, each of these has both a positive and a negative square root. Thus the square root of any x2 is +x, and so the square root of 16 is +4.
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