Yes. It's the whole number negative 36.
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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
The negative square root of -144 is -12i - that is -12 times the square root of minus 1, ie √-144 = 12√-1. The above is a complex number, which I suspect is not the answer you wanted; there is no real number that is the square root of a negative number If you wanted the negative square root of 144, then it is -12.
you have to count 144 times.
Yes. It's the ratio of -144 and 4. That makes it a rational number by definition.
Positive and negative roots, eg 12 x 12 = 144 and -12 x -12 = 144