wikiHow Quadratic Equation Practice Problems and Answers 1. x^2 + 4x + 4 = 0 2. x^2 - 5x + 6 = 0 3. 2x^2 + 5x - 3 = 0 4. 3x^2 - 7x + 2 = 0 5. x^2 - 4x + 4 = 0 6. x^2 + 2x + 1 = 0 7. 2x^2 - 7x + 3 = 0 8. x^2 - 9x + 20 = 0 9. 4x^2 - 8x + 4 = 0 10. 3x^2 + 5x + 2 = 0 11. x^2 + x - 6 = 0 12. 2x^2 + 6x + 8 = 0 13. x^2 - x - 2 = 0 14. 3x^2 + 2x - 1 = 0 15. x^2 - 6x + 9 = 0 16. 2x^2 - 5x + 2 = 0 17. x^2 + 5x + 6 = 0 18. 4x^2 + 8x + 4 = 0 19. x^2 - 10x + 25 = 0 20. 2x^2 + 5x - 3 = 0 Answer Key: 1. x = -2, x = -2 2. x = 1, x = 6 3. x = -1, x = -3 4. x = 1, x = 2 5. x = 2, x = 2 6. x = -1, x = -1 7. x = 1, x = 3 8. x = 5, x = 4 9. x = 1, x = 1 10. x = -1, x = -2 11. x = -2, x = 3 12. x = -2, x = -4 13. x = 1, x = -2 14. x = -1, x = -3 15. x = 3, x = 3 16. x = 1, x = 2 17. x = -6, x = -1 18. x = -1, x = -1 19. x = 5, x = 5 20. x = -1, x = -3 Note: These answers assume that the solutions are real numbers. Page