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The negative square root of a number is expressed as -√n or -n^½.

The question probably may refer to the square root of a negative number.

In mathematics there is an identity i² = -1 so that i = √-1

The square root of a negative number can be shown in several ways.

For Example : √-36 = √( -1 x 36) = √-1 x √36

The square root of 36 is ±6, and the square root of -1 is i.

The solution to √-36 is therefore ±6i.

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