A polynomial function of degree
has at most
distinct real zeros and at most
turning points.
The function is .
The degree of the function is .
Since the degree of the function is (
), the function
has at most
(
) distinct real zeros and at most
(
) turning points.
Find the real zeros by equating to zero.
Solve the equation by using factoring.
Apply zero product property.
\Thus, the function has three distinct real zeros at
and
.
Check :
\Graph the function to confirm these zeros.
Graph of the function is :
Observe the above graph :
\The function has three distinct real zeros at
and
.
The possible turning points are .
The number of possible real zeros are .
Distinct real zeros are and
.
Turning points are .