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
touches the
- axis at
.
The zero is a zero of multiplicity
, so the graph of
crosses 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 .
The function has atmost turning points.
Determine the behavior of the graph of near each
- intercept :
Near :
.
A parabola openining down.
\Near :
A line with slope .
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.
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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 of
, crosess ;
: multiplicity of
, touches.
Step 4 : At most turning points.
Step 5 :
\Near :
.
Near :
.
Step 6 : Graph of the function :
.