Really !
To square a number represented by anything inside a square-root sign,
take away the square-root sign.
The square of [ sqrt(792) ] is 792 .
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A square root
False
It is the principal square root.
The square root of 64 is 8, which is a rational number.
You don't. If the negative sign is outside the radical, then you take the square root of the number and apply the negative. If the negative sign is inside the radical, you will have an imaginary number.