Graph the quadratic equation and identify

Name: ___________________________________

Unit 8: Quadratic Equations

Date: ________________________ Bell: ______

Homework 3: Quadratic Roots

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1. The points at which a quadratic equation intersects the x-axis are referred to as: !

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!

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!

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!

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Graph the quadratic equation and identify the solution(s). 2. y = x2 + 2x – 3

x

3. y = x2 – 8x + 12

y

x

y

Solutions: 4. y = x2 – 4

x

Solutions: 5. y = -x2 + 10x – 21

y

x

y

Solutions: 6. y = x2 – 4x + 5

x

Solutions: 7. y = -2x2 – 8x

x

y

Solutions:

y

Solutions: © Gina Wilson, 2013

8. y = x2 – 6x + 9

x

9. y = x2 + 4x + 9

x

y

Solutions:

y

Solutions:

Use the discriminant to determine the number of solutions. 10. y = x2 – 3x + 2

11. y = 2x2 – 4x + 3

12. y = -3x2 + 5x – 1

13. y = x2 – 5x – 10

14. y = -x2 + 2x – 1

15. y = 4x2 – 9

© Gina Wilson, 2013