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Section 5.1 Modelling Pollynomials€¦ · Section 5.1.notebook 2 October 18, 2013 Section 5.1...

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Section 5.1.notebook 1 October 18, 2013 Key Words... polynomial term coefficient degree constant term monomial binomial trinomial like terms Chapter 5 Polynomials
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Page 1: Section 5.1 Modelling Pollynomials€¦ · Section 5.1.notebook 2 October 18, 2013 Section 5.1 Modelling Pollynomials We can use algebra tiles to model an expression... represents

Section 5.1.notebook

1

October 18, 2013

Key Words...• polynomial• term• coefficient• degree• constant term• monomial• binomial• trinomial• like terms

Chapter 5 ­ Polynomials

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October 18, 2013

Section 5.1 ­ Modelling Pollynomials

We can use algebra tiles to model an expression...

represents +1

represents ­1

Reminder...A +1 tile and a ­1 tile represent a zero pair

represents any positive variable (x or n)

represents any negative variable ( ­x or ­n)

ex: ex:

Try these...

a) b) c)

d) e)

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October 18, 2013

Modelling, Writing and Classifying Polynomials

For expressions containing                terms...we use...

represents 

represents 

ex: Model 

ex: Model 

4 positive tiles 3 negative tiles 2 positive tiles

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In the term       , 3 is the coefficient (number in front of the variable)

In the term        , 5 is a constant (value never changes)

In the term          , ­2 is the coefficient

Polynomial ­ is one term or sum of terms, whose variables have whole number exponents

It has 3 termsNote:  Terms are separated by an addition or subtraction sign

is a term

is a term

is a term

has a degree of 2

the term with the greatest exponent determines the degree of the polynomial

has a degree of 2

has a degree of 1

has a degree of 0

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October 18, 2013

Types of Polynomials depend on the number of terms...

Type of Polynomial

Number of Terms Examples Types of tiles

Monomial 12s2­2n4

has only one type of tile

Binomial 2x2 + 32a ­ 1

­2b2 + 3b

has two different types 

of tiles

Trinomial 3 ­c2 + 4c ­2x2 + 2x ­ 8

has three different types 

of tiles

***Monomials, Binomials and Trinomials are all Polynomials

***Polynomials are written (usually) in descending order (highest exponent to lowest)

ie: 2k ­ 4k2 + 7

written as...

­4k2 + 2k + 7

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October 18, 2013

Recognizing the same Polynomials with different variables...

Q: Which of these polynomials can be represented by the same alge tiles? Or which are equivalent?

a) 3x2 ­ 5x + 6 b) ­5 + 6r + 3r2 c) ­5m + 6 + 3m2

3 (x2 tiles) 5 (­1 tiles) 5 (­m tiles)

5 (­x tiles) 6 (r tiles) 6 (+1 tiles)

6 (+1 tiles) 3 (r2 tiles) 3 (m2 tiles)

a and c both use the same kind and # of tiles, therefore they are equivalent

Another method would be to put them in descending order...

a) 3x2 ­ 5x + 6 b) ­5 + 6r + 3r2 c) ­5m + 6 + 3m2

3x2 ­ 5x + 6 3r2 + 6r ­ 5 3m2 ­ 5m + 6

Same

Textbook: pp. 214 ­ 216, #'s 4 ­ 16, 18

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October 18, 2013

Grade 9 Math ­ Chapter 5 ­ Section 5.1

Grade:9 Subject:Mathematics

Date:February

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1

A

B

C

D

A large white square represents an x2­tile, a black rectangle represents a −x­tile,anda small white square represents a 1­tile.

Write the polynomial represented by this set of algebra tiles.

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2

A

B

C

D

A large white square represents an x2­tile, a large black square represents a −x2­tile, a small white square represents a 1­tile, and a small black square represents a −1­tile.

How would you model the polynomial                                                                                                                                                                               with algebra tiles?

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October 18, 2013

3

A

B

C

D

Which of the following expressions are polynomials?

i)                                    

ii)                                                  

iii)                                           iv)      

i, iii, and iv

ii and iv

i, ii, and iii

i, ii, and iv

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October 18, 2013

4

A

B

C

D

How many terms are in the polynomial  ?

10

1

11

3

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5

A

B

C

D

Which of the following expressions is a binomial with degree 2?i)      ii)       iii)      iv)      

i

ii

iv

iii

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October 18, 2013

6

A

B

C

D

Which of the following expressions are monomials with degree 2?i)      ii)      iii)      iv)      

ii and iii

ii and iv

iii and iv

i and ii

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October 18, 2013

7

A

B

C

D

Name the coefficients of the variable in the polynomial 

4

4, 10

4,  12

4, 10

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October 18, 2013

8

A

B

C

D

Identify the polynomials that can be represented by the same set of algebra tiles.i)      ii)      iii)      iv)      

iii and iv

i and iv

ii and iv

i and ii

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9

A

B

C

D

Identify the polynomial that is equivalent to i)      ii)      iii)      iv)      

iv

ii

i

iii

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October 18, 2013

10

A

B

C

D

What algebra tiles would you use to model the polynomial  ?

6 x2­tiles, 4 −x­tiles, and 4 1­tiles

2 x2­tiles, 4 x­tiles

4 −x2­tiles, 4 x­tiles, and 6 1­tiles

4 x2­tiles, 4 −x­tiles, and 6 −1­tiles


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