I used to teach math, so pardon me if I barge in here ...
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The '''square root''' of a number ''x'' is a number that, multiplied by itself, results in ''x''. The symbol for the square root of ''x'' is <math>\sqrt{x}</math>.
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The '''square root''' of a number ''x'' is a number that, multiplied by itself, results in ''x''. For example, 5 × 5 = 25 so 5 is a square root of 25. Also, -5 × -5 = 25 so 5 is the other square root.
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The symbol for the square root of ''x'' is <math>\sqrt{x}</math>.