2. Multiply a Polynomial by a
Monomial
Multiply each term
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
by the monomial
outside the
parenthesis.
The number of terms
inside the parenthesis
will be the same as
after multiplying.
3. Multiply a Polynomial by a
Monomial
Multiply each term
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
by the monomial
outside the
3x 2
( 2x ) + 3x ( !7x ) + 3x ( 5 )
2 2 2
parenthesis.
The number of terms
inside the parenthesis
will be the same as
after multiplying.
4. Multiply a Polynomial by a
Monomial
Multiply each term
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
by the monomial
outside the
3x 2
( 2x ) + 3x ( !7x ) + 3x ( 5 )
2 2 2
parenthesis.
The number of terms
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
will be the same as
after multiplying.
5. Multiply a Polynomial by a
Monomial
Multiply each term
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
by the monomial
outside the
3x 2
( 2x ) + 3x ( !7x ) + 3x ( 5 )
2 2 2
parenthesis.
The number of terms
inside the parenthesis
(
3x 2x ! 7x + 5
2 2
)
will be the same as 6x ! 21x + 15x
4 3 2
after multiplying.
6. Multiply a Polynomial by a
Monomial
Review this Cool Math site to learn about
multiplying a polynomial by a monomial.
Do the Try It and Your Turn problems in
your notebook and check your answers on
the next slides.
12. Try It - Page 1
Multiply: (
6x 2x + 3
4 2
)
Distribute the monomial.
6x ! 2x + 6x ! 3
4 2 4
Multiply each term.
12x + 18x
6 4
Verify your answer has same number of terms
as inside original ( ). Both have 2 terms.
19. Your Turn - Page 2
multiply:
3
(
10x 2x + 1 ! 3x + x 5 2
)
( )
10x 2x + 10x (1) + 10x !3x + 10x ( x )
3 5 3 3
( 2
) 3
Put in descending 20x + 10x ! 30x + 10x
8 3 5 4
order and verify
number of terms.
(Both have 4 terms.)
20. Your Turn - Page 2
multiply:
3
(
10x 2x + 1 ! 3x + x 5 2
)
( )
10x 2x + 10x (1) + 10x !3x + 10x ( x )
3 5 3 3
( 2
) 3
Put in descending 20x + 10x ! 30x + 10x
8 3 5 4
order and verify
number of terms.
(Both have 4 terms.)
20x ! 30x + 10x + 10x
8 5 4 3
21. Try It - Page 2
Multiply:
5
(
4x w w ! x + 6xw ! 1 + 3x w
2 2 2 4 8
)
22. Try It - Page 2
Multiply:
5
(
4x w w ! x + 6xw ! 1 + 3x w
2 2 2 4 8
)
Distribute the monomial.
23. Try It - Page 2
Multiply:
5
(
4x w w ! x + 6xw ! 1 + 3x w
2 2 2 4 8
)
Distribute the monomial.
5
( 2
) 2 5
( 2
)
4x w ( w ) + 4x w !x + 4x w 6xw + 4x w ( !1) + 4x w 3x w
2 5 2 2 5 2 5
( 4 8
)
24. Try It - Page 2
Multiply:
5
(
4x w w ! x + 6xw ! 1 + 3x w
2 2 2 4 8
)
5
( 2
) 2 5
( 2
)
4x w ( w ) + 4x w !x + 4x w 6xw + 4x w ( !1) + 4x w 3x w
2 5 2 2 5 2 5
( 4 8
)
Multiply each term.
25. Try It - Page 2
Multiply:
5
(
4x w w ! x + 6xw ! 1 + 3x w
2 2 2 4 8
)
5
( 2
)
4x w ( w ) + 4x w !x + 4x w 6xw + 4x w ( !1) + 4x w 3x w
2 5 2 2 5
( 2
) 2 5 2 5
( 4 8
)
Multiply each term.
4x w ! 4x w + 24x w ! 4x w + 12x w
2 6 4 5 3 7 2 5 6 13
Verify answer has 5 terms like original parenthesis.
