Sistemas Polinomiales Cuadr´ aticos con un Punto CrDegenerado Quadratic Polynomial Systems with Degenerate Critical Point

This article presents a qualitative analysis is presented quadratic systems that They have at most two critical points where one is a point degenerate critical to this first identify and classify quadratic systems with a degenerate critical point and thus facilitate their study and then phase portraits obtained from analysis are plotted These qualitative sistemas. For this study the quadratic systems differential equations was necessary to use some results important on the theory of textit systems not Linear , therefore they included some definitions and theorems that were vital for the study, as they determine the next steps for the qualitative analysis of any nonlinear system.