Tolong ya... Mohon bantuannya

x^4 - 2x^3 -2x^2-1 >_ x^2-1

x^4 - 2x^3 - 2x^2 >_ x^2 -1 +1

x^2 ( x^2 - 2x - 2 ) >_ x^2
x^2 -2x - 2 >_ 1
x^2-2x -3 >_ 0
(x- 3) (x+1) >_ 0

x-3 = 0
x= 3

x+1 = 0
x = -1

hp = {3, -1}