IMSUB(inumber1, inumber2)

Returns the difference of two complex numbers.

inumber1The first complex number.
inumber2The second complex number.

* If any of the arguments are not in the form x + yi or x + yj, then #NUM! is returned.
* You can use the COMPLEX function to convert real and imaginary coefficients into a complex number.
* For the Microsoft documentation refer to
* For the Google documentation refer to

1=IMSUB("13+4i","5+3i") = 8+i
2=IMSUB("13+4i","i") = 13+3i
3=IMSUB("5+3i","13+4i") = -8-i
4=IMSUB("5+3i","5+3i") = 0
5=IMSUB("some text","13+4i") = #NUM!
6=IMSUB("5+3i","some text") = #NUM!

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