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square root
Sign in to saveAlso known as 2nd root, second root, square root function, second root function, 2nd root function
inverse operation of square for finding the original base number; that base number itself
A square root is the number that, when multiplied by itself, gives you the original number—for example, 3 is the square root of 9 because 3 × 3 = 9. Square roots matter because they let us reverse the squaring process and solve practical problems in areas like construction, engineering, and science where we need to find missing measurements.
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- Commons category
- Square root
- TeX string
- \sqrt[2]{x}
- Unicode character
- √
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Notation for the (principal) square root of x. For example, √25 = 5, since 25 = 5 ⋅ 5, or 5 (5 squared).
In mathematics, a square root of a number x is a number y such that
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