
UNIT 4 : POLYNOMIAL FUNCTIONS
LESSON 2:
INVESTIGATING POLYNOMIAL FUNCTIONS
_{}
Cubic Functions in Factored Form with
Repeated Factors: f(x) = k(x – a)(x –
b)^{2}
x 
y 
1 
4 
Quartic Functions in Factored Form with
Repeated Factors: f(x) = k(x – a)(x –
b)(x – c)^{2}
x 
y 
1 
16 
Note: From
the examples above we can make the following observations.
End Behaviours of Polynomial Functions:
By the term end behaviors, we mean we are investigating the
behavior of the function (y) as x takes on
larger and larger positive or negative values (increases without bound or decreases without bound).