Question 977184
Divide the factors of the constant at the end by the coefficient at the beginning.
+/- 
Factors are 1,2,4 and 1,2.  Some will repeat.

+/- 1, 1/2, 2, 4

{{{graph(300,300,-5,5,-5,5,4x^5-8x^4-5x^3+10x^2+x-2)}}}