We draw the graph of  by plotting points:

(-2,5), (-1,0), (0,-3), (1,-4), (2,-3), (3,0), (4,5)

 

Since we want to solve , and we have the 
graph of , so we want to know where y is
greater than 0.  So the solution will be the values of x
fro which the graph is ABOVE the x-axis.  Not including
the intercepts, the red part of the graph is ABOVE the 
x-axis and the green part is below the x-axis. So the part
of the x-axis that the red part of the graph is above,
is given interval notation as 

Edwin