why root over of( -1) is imaginary number???
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because square of any no. can't be negative
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Any number times itself is a positive number (or zero) so you can't ever get a negative numbers by squaring. Since square roots undo squaring, negative numbers can't have square root.
So as (-1) is a negative number it is an imaginary number.
So as (-1) is a negative number it is an imaginary number.
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