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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.

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2015-09-01 19:28:37
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2011-02-25 13:24:05


i is a complex number... it means sqrt(-1)

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Q: What is the square root of negative 144?
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