Respuesta :

(b+8) * 5b^2
__________
b * (b^2-64)


(b+8)*5*b^2
__________
b*(b-8)*(b+8)

5b
___
(b-8)

Check, say b = 1: my result is 5/(-7), the original: 9/1:-63/5 = -45/63=-5/7! Yup!
ACCESS MORE