Question

find all the zeros of x ki power4 -3 x ki power 3 - x ki power 2 + 9x- 6 if you know that two of its zeroes are √3 and -√3

Answer 1

First we divide x4-3x3-x2+9x-6by x-3 we got x2-3x+2 And then we find zeroes of x2-3x+2 and we got two zeroes more which are 1 and 2.
All zeroes are 1,2,Root3,-Root3