Could this be a list of zeroes representing the factorised expression:
(x-3)2(x-6)(x+8)?
This means the zeroes are 3 (twice), 6 and -8. Hence, (2) 3 6 -8.
The polynomial after expansion:
(x2-6x+9)(x2+2x-48)=
x4+2x3-48x2
-6x3-12x2 +288x
+9x2 +18x-432=
x4-4x3-51x2+306x-432, which has the zeroes (roots) 3, 6, and -8.