Symbols:Vinculum/Examples/Square Root

Example of Use of Vinculum
Consider the square root symbol used in this context:
 * $\sqrt {25 - 9}$

The bar over the $25 - 9$ is an example of a vinculum.

The expression can also be written:
 * $\map \surd {25 - 9}$

Hence the expression equates to $\surd 16 = 4$.

Note that this is not the same as $\surd 25 - 9$ which equals $-4$.