Precal Unit 3 Irrational Zeros/Descartes' Rule of Signs

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The zeros for the following are (write answers in simplest form):

3. f(x) = 2x³ +5x² -24x - 60; ​

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and ​ ​

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4. f(x) = 3x³ - 15x² - 4x + 20; ​ ​

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and ​

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-5/2

±2√3

±2√3/3

5

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Find all the real zeros for the following function.

7. f(x) = x³ - 5x² - 29x -15; ​ ​

​

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​

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​ ​

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-3

4±√21

1

​-3±2√7

-4

6

6±√39/3

3±3√5/2

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Find all real zeros of the following function.

8. f(x) = x³ + 5x² -25x + 19; ​

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​​

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1

-3±2√7

4±√21

6±√39/3

3±3√5/2

-3

-4

6

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Find all real zeros for the following function.

9. f(x) = x³ + x² -21x -36; ​

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​​

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-4

3±3√5/2

1

3

-3

6

-3±2√7

4±√21

6±√39/3