M
ATH
9 H
ONOURS
S
ECTION
4.1
M
ULTIPLYING
& D
IVIDING
P
OLYNOMIALS
I) R
EVIEW
When multiplying two variables with the same base,
you “
add
” the exponents
When dividing two variables with the same base, you
“
subtract
”
the exponents
When multiplying a polynomial with a monomial, distribute
each term inside the brackets with the monomial.
One polynomial is the length and the other is the width
The product is the area of the rectangle formed by the two
sides
P
RACTICE
: S
IMPLIFY
THE
FOLLOWING
Expand by
distributing
Expand by
distributing
Expand by distributing
Combine Liketerms
When dividing polynomials, divide each term in the
quotient by the monomial in the divisor
The polynomial in the numerator is the area
The divisor is the length of the rectangle
The quotient is the width of the rectangle
P
RACTICE
SIMPLIFY
Divide each
term by the
denominator
Divide each
term by the
denominator
Divide each term by
the denominator
Simplify by combining
liketerms
II) M
ULTIPLYING
TWO
B
INOMIALS
When multiplying two binomials, use each binomial to form
the sides of a rectangle
Expand to find the area
Another method for multiplying
two binomials is by using FOIL
F
irst
O
utside
I
nside
L
ast
P
RACTICE
: E
XPAND
THE
BINOMIALS
II) E
XPANDING
B
INOMIALS
WITH
T
RINOMIALS
Make each term the sides of a polynomial
Expand and combine Like-Terms
Ex: Expand and Simplify:
Width: 2x + 3
Length: 4x
2
– 7x + 12
Combine Like-Terms
P
RACTICE
: E
XPAND
EACH
OF
THE
FOLLOWING
E
X
: F
IND
THE
A
REA
OF
THE
SHADED
R
EGION
Split the area into 2 separate Rectangles
Find the Dimensions of each Rectangle
Find the Area of each Rectangle and add
them together
Practice: Find the Area of the shaded Region
Split the area into 2 separate Rectangles
Find the Dimensions of each Rectangle
Find the Area of each Rectangle and add
them together