  In the present work we discuss how to address the solution of electrostatic
problems, in professional cycle, using Green's functions and the Poisson's
equation. By using this procedure, it was possible to verify its relation with
the method of images as an interdisciplinary approach in didactic physics
textbooks. For this, it was considered the structural role that mathematics,
specially the Green's function, have in physical thought presented in the
method of images.
