Respuesta :


                                x + 5
                           ---------------------------------
   x^2 + 5x + 4    | x^3 + 10x^2 + 29x + 20
                         -  x^3 +   5x^2 +   4x
                        ----------------------------
                                        5x^2 + 25x + 20
                                     -  5x^2 + 25x + 20
                                     -------------------------
                                                                 0

(x^3 + 10x^2 + 29x + 20) / (x^2 + 5x + 4) = x + 5