The square root of -1 is the imaginary number i.
So the square root of -4 = 2i
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4 square root of -9 = 4 square root of (-1)(9) = 4 square root of (i29) = 4(3i) = 12i
The negative square root of 16 can be either +4 or -4 . Both are correct.
-4
-28(square root)10
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