So what exactly is a complex number?

[Grzegorz Słodkowicz]

>> In fact, a proper vector in physics has 4 features: point of
>> application, magnitude, direction and sense.
>>     
>
> so whats the "point of application" of the sum of two vectors?  Do
> tell.
I believe vectors can only be added if they have the same point of 
application. The result is then applied to the same point.

Regards,
Greg