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**Devantè****Real Member**- 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 = 02. x² + 2x - 4 = 03. -5x² - 2x + 9 = 04. 3x² + x - 7 = 05. -12x² + 5x + 6 = 06. -6x² - 11x + 2 = 07. x² - 9x + 5 = 08. -7x² - 4x + 10 = 09. -9x² + 6x - 2 = 010. 10x² - 7x - 11 = 011. 12x² + x + 5 = 012. 2x² - 3x + 1 = 013. 11x² + 9x - 6 = 014. -10x² + 5x + 7 = 015. -5x² - 4x + 12 = 0**

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

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

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

Where

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