What Does The Check Mark Sign Mean In Math?


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Oddman answered
√2 means "the square root of 2." The symbol √ is a single character representation of the radical symbol that would normally have an over-bar extending over the radicand. When using the √ symbol, it is necessary to enclose the radicand in parentheses so there is no ambiguity as to meaning. Example   √x+2 could mean √(x+2) or it could mean (√x)+2, for example.

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