The inequality is
.
Now we find the intercepts
\First find y-intercept
\
(Replace x by 0)
(Simplify)
The y-intercept is
.
Next find x-intercepts
\
(Replace f (x) = 0)
(
write as
)
(Take out common factors)
(Simplify)
(Apply zero product property)
(Simplify)
The x-intercepts are
.
Graph the function 
The vertex is at
, 
(Simplify)
(Replace
)
(Simplify)
(Simplify)
The vertex is 

Graph the solution set on a number line. 
The solution set is
.