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## #1 2006-08-17 05:26:56

Devantè
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Registered: 2006-07-14
Posts: 6,400

Excercises on the Discriminants of Quadratic Equations

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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Last edited by Devanté (2006-08-17 05:28:47)

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## #2 2006-11-04 01:21:37

Toast
Real Member
Registered: 2006-10-08
Posts: 1,321

### Re: Discriminants of Quadratic Equations

The discriminants of the questions above can be worked out with the aid of:

Where

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