Question 816306
values of interest:

x=4, x=-2, x=2

Test:

x=-3 leads to

-7/5 <= 0 True

x=0 leads to

-4/-4=1 < = 0  False

x=3 leads to

-1/5 <=0 True

x=5 leads to 

1/21 <= 0 False


solution:

(-oo,-2) U (2, 4]