Write all real and imaginary zeros.

Question

f(x)=x^3-8x^2+x-8

-8--1,-2,-4,-8
1
-+1,-+2,-+4,-+8

1 -8 1 -8

1
1 -7 -6
1 -7-6 -14

2 1 -8 1 -8
2 -12 -22
1 -6 -11 14

4 1 -8 1 -8
4 -16 -60
1 -4 -15 -52

8 1 -8 1 -8
8 0 8
1 0 1 0

answer: 8 is zero of f(x)