Square root
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In mathematics, a square root of a number x is a number y such that y 2 = x ; in other words, a number y whose square is x. For example, 4 and −4 are square roots of 16 because 4 2 = 2 = 16.
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First leaf of the complex square root
Second leaf of the complex square root
Expression (mathematics)
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In mathematics, an expression is an arrangement of symbols following the context-dependent, syntactic conventions of mathematical notation. Symbols can denote numbers, variables, operations, and funct
The 1489 use of the plus and minus signs in print.
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