Building on Guest's answer (Thanx!)
Between x = -4 and + 1/5 the graph is neg or zero
Below -4 or above +1/5 it is > 0
so (-inf,-4) U (1/5, + inf) it is greater than zero (or the original equation is > 20)
EDIT: So NOT satisfied would be [-4,1/5] -4, -3,-2,-1 0 FIVE integer values