Question: Problem with transformations of complex numbers

Please help me with transformation of the following expression:

> z:=abs(a)^2*b+abs(a)^2*c*conjugate(a);

where I want to derive


I try the following:

> z:=collect(z,a);

However it does't transformate z in any way.


In other words if I have


I derive z=|a|^2. How to decompose z back into a*conjugate(a)?


Thank you.

Please Wait...