Math 2.0

Real functions Concept

Square root

Summary

A square root of a number xx is a number yy with y2=xy^2 = x. Each nonnegative real number xx has exactly one nonnegative square root, the principal square root x\sqrt{x}. For example, 9=3\sqrt{9} = 3, and the square roots of 99 are 33 and −3-3.

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Further reading

  1. Web https://en.wikipedia.org/wiki/Square_root, lead section
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