The polynomial function is .
Rewrite the function as .
Find the intercepts :
\Find -intercepts by equating
to zero.
Rational zeros method :
\Rational Root Theorem, if a rational number in simplest form is a root of the polynomial equation
, then
is a factor of
and
is a factor if
.
If is a rational zero, then
is a factor of
and
is a factor of
.
The possible factors of are
.
The possible factors for are
.
So, .
Consider .
Using synthetic division:
\
Thus, .
and
.
The -intercepts are
.
Find the -intercept by substituting
in
.
The -intercept is
.
Construct a table to find the ordered pairs.
\Choose different values of and find corresponding
values.
\
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(1). Draw a coordinate plane.
\(2). Plot the intercepts.
\(3). Plot the points obtained in the above table.
\(4). Connect those points with a smooth curve.
\Graph :
\.
Graph of the polynomial function :
Graph :
\.