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If you take the square root of any number (or expression) and then square the result again, you will usually obtain the same number (or expression) again. Or more precisely, its absolute value. That is, sometimes you can make the simplifying assumption that you get the same expression, but to be on the safe side, you must consider the possibility that the original expression is negative, in which case the square of the square root is the absolute value of the original expression.

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Wiki User

11y ago
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There is no simplification for the square root of x2 - 2x.

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Wiki User

12y ago
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sqrt(XX) - 2x = X - 2X = -X

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12y ago
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Q: What is the square root of 2x squared?
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