1. finding zeros

use synthetic division to determine the zeros

$f(x)=x^4-4x^3+15$

2. Originally Posted by uglygreencouch
use synthetic division to determine the zeros

$f(x)=x^4-4x^3+15$
synthetic division won't work here (there are no rational roots to this equation). make sure you have the correct question

3. Originally Posted by Jhevon
synthetic division won't work here (there are no rational roots to this equation). make sure you have the correct question
That was my first thought and I guess that's why it confused me. That is what the question says verbatim.