That's the same as the square root of positive nine, multiplied by i. Here, "i" is the so-called imaginary unit; despite its name, which it has for historical reasons, "imaginary" numbers have many applications in math, science, and technology.
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square root of a negative number is imaginary square root of negative 1 is defined as i square root of negative 144 is sqrt ((144)(-1)) = 12i
It is rational. It is rational. It is rational. It is rational.
The square root of a negative number is not real.
Negative 64 is the square root of an integer. The square root of -64 is not an integer.
Nothing. You cannot have a square root of a negative number. The square root of negative one is called i, but i is an imaginary number. It does not exist and does not follow the properties of real numbers. (For example, if a and b are positive, then the square root of a times the square root of b is the square root of ab. But the square root of -7 is not the square root of 7 times i.)