MATLAB: Find out the real part of symbolic expression by using MuPad

Question

Hello. I'm trying to find out the real part of the following symbolic expression:

y0*(y2+jy0)/(y0+jy2)

by using MuPad

I write the following code in the mupad command window

Re(y0*(y2+I*y0)/(y0+I*y2))

but I don't get the result I expect. Do you know how to fix out the issue?

Answer 1

Re(y0*(y2+I*y0)/(y0+I*y2)) assuming ([y0,y2],Type::Real)

or

assume([y0,y2],Type::Real);
Re(y0*(y2+I*y0)/(y0+I*y2));