-12 = 4 x 3 x -1 so sqrt = 2i root 3
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The square root of a negative number is considered an imaginary number. In this case, the square root of -49 is 7i, where i represents the imaginary unit (√-1). This is because when you square 7i, you get -49.
No, but √-23 is. An imaginary number is the square root of a negative number.
They are imaginary.
Yes it is an imaginary number
A negative square root is an imaginary number.