Descartes'S Rule Of Signs - Upper And Lower Bound Rules

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Name ________________________________________________ Date____________________

HW26: Descartes’s Rule of Signs/Upper and Lower Bound Rules Ms. Wong, Hn PreCalc Pd4

State the number of positive and negative zeros for each function.

5

4

3

2

1. �� ( �� ) = 2��

− 10��

+ 7��

− 35��

− 4�� + 20

5

4

3

2

2. �� ( �� ) = 2��

− 4��

+ 15��

− 30��

+ 27�� − 54

6

3

3. �� ( �� ) = 8��

+ 63��

− 8

9

6

3

4. �� ( �� ) = 27��

+ 8��

− 27��

− 8

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