Respuestas

2012-05-17T16:29:55+02:00
2012-05-17T17:10:23+02:00

(x + 9) (x + 4)

(x + 6) (x – 1) 

(x – 4) (x + 2)

(x + m) (x + y)

(x + 11) (x – 7)

(x – 6) (x – 9)

(x – c) (x + d)

aqui hay 8 ejercicios