The function is
.
Determine the end behavior of the graph of the function :
\Expand the polynomial.
\

.
The polynomial function
is of degree
.
The graph of
behave like
for large values of
.
Find the intercepts of the function :
\
Find the
- intercepts by substituting
in
.

,
and
.
and
.
- intercepts are
and
.
Find the
- intercepts by substituting
in
.

.
- intercept is
.
Determine the zeros of the function and their multiplicity :
\Use this information to determine whether the graph crosses or touches the
- axis at each
-intercept.
The zeros of the function are
and
.
The zero
is a zero of multiplicity
, so the graph of
croses the
- axis at
.
The zero
is a zero of multiplicity
, so the graph of
croses the
- axis at
.
The zero
is a zero of multiplicity
, so the graph of
touches the
- axis at
.
Determine the maximum number of turning points on the graph of the function :
\Degree of the function
is
.
Therefore, the number of turning points
.
At most
turning points.
Determine the behavior of the graph of
near each
- intercept :
Near
:

.
A line with slope
.
Near
:


A line with slope
.
Near
:


A parabola openining up.
\ \Put all the information from the steps 1 through step 5 together to obtain graph of
:
Plot the intercepts.
\Construct a table of values to graph the general shape of the curve.
\![]() | \
\
| \
\
| \
![]() | \
\
| \
\
| \
![]() | \
\
| \
\
| \
![]() | \
\
| \
\
| \
![]() | \
\
| \
\
| \
Plot the points found in the above table and connect the plotted points.
\Graph of the function
:
.
Step 1 :
.
Step 2 :
- intercept is
and
- intercepts are
and
.
Step 3 :
: multiplicity
, crosess ;
: multiplicity
, touches.
Step 4 : At most
turning points.
Step 5 :
\Near
:
.
Near
:
.
.Near
:
.
Step 6 : Graph of the function
:
.