More on Quadratic equations. It helps to understand this area, too, and it may prove useful at times.
Find the discriminants of the following equations.
1. -x² - 12x + 3 = 0
2. x² + 2x - 4 = 0
3. -5x² - 2x + 9 = 0
4. 3x² + x - 7 = 0
5. -12x² + 5x + 6 = 0
6. -6x² - 11x + 2 = 0
7. x² - 9x + 5 = 0
8. -7x² - 4x + 10 = 0
9. -9x² + 6x - 2 = 0
10. 10x² - 7x - 11 = 0
11. 12x² + x + 5 = 0
12. 2x² - 3x + 1 = 0
13. 11x² + 9x - 6 = 0
14. -10x² + 5x + 7 = 0
15. -5x² - 4x + 12 = 0
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