Algebra: Square root, cubic root, N-th root

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Square root of a given number is another, non-negative, number that, when squared, equal to the given number. It is written as sqrt%28x%29. x=%28sqrt%28x%29%29%5E2. A root of n-th degree of a given number is another number that, when taken to n-th degree, is equal to a given number: x=%28root%28+n%2C+x+%29%29%5En. Root of second degree is the same as square root, root of third degree is called cubic root.

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