This function returns the square root of a complex number in the x+yi or x+yj text format.
IMSQRT(complexnum)
The complexnum argument is a complex number for which to return the square root.
An error is returned if the complexnum argument is not in the form "x+yi" or "x+yj". For more information, refer to Complex Numbers.
Accepts number and string data. Returns string data.
IMSQRT("2-5j")