Hello! I was wondering if there is a way to use parametric complex functions, i.e. giving as an input
Abs[x+iy]
get the output
Sqrt[x^2+y^2]
For example if I write Abs[1+i] I get Sqrt[2], but Abs[x+i] doesn't work (I guess that the software doesn't know that x is a real variable) Thanks for the help!
