1. Find the maximum number of positive and negative real zeros for this equation:

y = x³ - x² - x - 1

(Select) One positive, One negative One positive, Two negative Two positive, One negative Three positive, No negative

2. Find the maximum number of positive and negative real zeros for this equation:

y = 2x^4 - 7x³ + 9x² -3x - 7

(Select) Two positive, Two negative One positive, Three negative Three positive, No negative Three positive, One negative

3. Find the maximum number of positive and negative real zeros for this equation:

y = x^5 - 68x^4 + 1085x³ + 2450x² - 51

(Select) Three positive, Two negative Two positive, Three negative Four positive, One negative One positive, Four negative

4. Find the maximum number of positive and negative real zeros for this equation:

y = 2x³ + x - 3

(Select) No positive, One negative One positive, No negative One positive, Two negative Two positive, One negative

5. Find the maximum number of positive and negative real zeros for this equation:

y = x² -5x - 3

(Select) Two positive, No negative No positive, Two negative No answer undefined One positive, One negative

6. Find the maximum number of positive and negative real zeros for this equation:

y = - x³ - 2x² - 2x - 5

(Select) Three positive, No negative One positive, Two negative No positive, Three negative Two positive, One negative

7. Find the maximum number of positive and negative real zeros for this equation:

y = 3x³ - x² + 27x - 9

(Select) No positive, Three negative Three positive, No negative One positive, Two negative Two positive, One negative

8. Find the maximum number of positive and negative real zeros for this equation:

y = x³ + 3x² - 3x - 9

(Select) One positive, Two negative Two positive, One negative No positive, Three negative Two positive, Two negative

9. Find the maximum number of positive and negative real zeros for this equation:

y = x³ - 6x² + 7x + 4

(Select) One positive, Two negative Three positive, No negatives Two positive, One negative Two positive, Two negatives

10. Find the maximum number of positive and negative real zeros for this equation:

y = - 2x³ - x² - 9x + 9

(Select) No positive, Three negative One positive, One negative Two positive, One negative One positive, Two negative

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