First you must understand that this problem requires tail over head.
First the factors of 32 the tail
1,2,4,8,16,32 over the factors of the head which is one
Now you must put all of your factors together you solution can be + or -
here we go:
Which ones are the zeros?
This is your ONLY solution.
I will let someone else show you how to use synthetic division because latex is down and it would be impossible for you understand where I am coming from.