Respuestas

2012-06-30T08:10:01+02:00

X2+2(K+2)X+9K=0

X2+(2K+4)X+9K=0

K=4...DE TAL MODO QUE  X2+(2(4)+4)X+9(4)

                                       X2+12X+36

                                       X           +6

                                       X           +6                X+6=0

                                                                          X=-6

 

 

RESPUESTA : K = 4