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Intuitively 20.5is between 10.5 and 40.5. Since these values are 1 and 2 respectively 20.5 must be between 1 and 2. However since the roots to each of these numbers can be either posative (+) or negative (-) the roots can lie on either side of the 0. The answer is then that the root of two can be greater than -2 and less than -1, or less than +2 and greater than +1.

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14y ago
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Q: What is the square root of 2 on a number line?
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