Posted by ReRe on Thursday, April 4, 2013 at 3:30pm.
Factor the trinomial completely.
y to the 3rd power minus 14y to the 2nd power plus 48y

Math  Steve, Thursday, April 4, 2013 at 5:19pm
y^314y+48y
y(y^214y+48)
Now, which factors of 48 add to 14?
y(y6)(y8)