unit 2, lesson 4 theorems about zeros. getting started find the quotient and remainder when is...

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UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS

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Page 1: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

UNIT 2, LESSON 4

THEOREMS ABOUT ZEROS

Page 2: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

GETTING STARTED

• Find the quotient and remainder when

is divided by x-3.

542 23 xxxxf

Page 3: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

GETTING STARTED

• Find the quotient and remainder when

is divided by x-3. 542 23 xxxxf

212 Rxx

Page 4: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

GETTING STARTED

• Find the quotient and remainder when

is divided by x-3.

• Find f(3).

542 23 xxxxf

212 Rxx

Page 5: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

GETTING STARTED

• Find the quotient and remainder when

is divided by x-3.

• Find f(3).

542 23 xxxxf

212 Rxx

2

Page 6: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

REMAINDER THEOREM

•If a polynomial f(x) is divided by x-c, then the remainder is the number f(c).

Page 7: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

APPLICATION

•Find the remainder when

is divided by x-1.

53 2479 xxxf

Page 8: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

APPLICATION

•Find the remainder when

is divided by x-1.

53 2479 xxxf

9

Page 9: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

QUERY…

• What good does being able to quickly calculate the remainder do for us?

Page 10: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

FACTOR THEOREM

•The number c is a root of the polynomial f(x) exactly when x-c is a factor of f(x).

Page 11: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

PUTTING IT ALL TOGETHER…

•Determine if x-3 is a factor of

324 23 xxxxf

Page 12: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

PUTTING IT ALL TOGETHER…

•Determine if x-3 is a factor of

324 23 xxxxf

03323433 23 f

Page 13: UNIT 2, LESSON 4 THEOREMS ABOUT ZEROS. GETTING STARTED Find the quotient and remainder when is divided by x-3

PUTTING IT ALL TOGETHER…

•Determine if x-3 is a factor of

324 23 xxxxf

03323433 23 f