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square root of n^2, if n 0
square root of n^2, if n 0

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Square root of n^2 is -n

For example, (-3)^2 is 9, square root of nine is 3, -3=-(3)

Square root of a^2 is a,

For example, 2^2=4, square root of 4 is 2, 2=2.

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