IMSUB function
Returns the difference of two complex numbers in x + yi or x + yj text format.
Syntax
IMSUB(inumber1,inumber2)
Inumber1 is the complex number from which to subtract inumber2.
Inumber2 is the complex number to subtract from inumber1.
Remarks

Use COMPLEX to convert real and imaginary coefficients into a complex number.

The difference of two complex numbers is:
Example
The example may be easier to understand if you copy it to a blank worksheet.
How to copy an example

Create a blank workbook or worksheet.

Select the example in the Help topic.
Note Do not select the row or column headers.
Selecting an example from Help

Press CTRL+C.

In the worksheet, select cell A1, and press CTRL+V.

To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

