| 8.5x² - 42.5x - 204 = 0 x1 = -3 , x2 = 8 | -0.5x² + 0.5x + 6 = 0 x1 = -3 , x2 = 4 |
| 10x² - 80x = 0 x1 = 0 , x2 = 8 | 10x² - 100x = 0 x1 = 0 , x2 = 10 |
| 2x² - 28x + 90 = 0 x1 = 5 , x2 = 9 | -6.5x² + 52x = 0 x1 = 0 , x2 = 8 |
| -3x² = 0 x1 = 0 , x2 = 0 | 5x² - 20x - 25 = 0 x1 = -1 , x2 = 5 |
| 5.5x² - 5.5x - 66 = 0 x1 = -3 , x2 = 4 | -10x² - 10x = 0 x1 = -1 , x2 = 0 |
| 7.5x² + 30x - 240 = 0 x1 = -8 , x2 = 4 | -3x² + 192 = 0 x1 = -8 , x2 = 8 |
| 9.5x² - 57x = 0 x1 = 0 , x2 = 6 | -5x² - 40x + 100 = 0 x1 = -10 , x2 = 2 |
| 2.5x² + 7.5x = 0 x1 = -3 , x2 = 0 | 5.5x² - 16.5x = 0 x1 = 0 , x2 = 3 |
| 3x² + 27x = 0 x1 = -9 , x2 = 0 | -2.5x² + 20x + 50 = 0 x1 = -2 , x2 = 10 |
| 5.5x² - 11x - 440 = 0 x1 = -8 , x2 = 10 | -6.5x² - 32.5x + 234 = 0 x1 = -9 , x2 = 4 |