| -2.5x² + 27.5x - 60 = 0 x1 = 3 , x2 = 8 | -2.5x² - 15x = 0 x1 = -6 , x2 = 0 |
| -6.5x² + 45.5x - 65 = 0 x1 = 2 , x2 = 5 | -10x² - 130x - 360 = 0 x1 = -9 , x2 = -4 |
| -5.5x² + 88x - 330 = 0 x1 = 6 , x2 = 10 | -3.5x² + 7x + 168 = 0 x1 = -6 , x2 = 8 |
| x² - 2x - 8 = 0 x1 = -2 , x2 = 4 | 5x² - 50x + 120 = 0 x1 = 4 , x2 = 6 |
| -7x² - 42x - 56 = 0 x1 = -4 , x2 = -2 | 10x² - 100x + 160 = 0 x1 = 2 , x2 = 8 |
| 10x² + 90x = 0 x1 = -9 , x2 = 0 | -4.5x² - 58.5x - 180 = 0 x1 = -8 , x2 = -5 |
| 8.5x² + 51x - 136 = 0 x1 = -8 , x2 = 2 | 2.5x² + 15x - 17.5 = 0 x1 = -7 , x2 = 1 |
| -3x² - 12x + 180 = 0 x1 = -10 , x2 = 6 | 8.5x² - 17x - 204 = 0 x1 = -4 , x2 = 6 |
| -1.5x² - 16.5x - 27 = 0 x1 = -9 , x2 = -2 | 6x² - 30x - 84 = 0 x1 = -2 , x2 = 7 |
| 3.5x² - 35x = 0 x1 = 0 , x2 = 10 | 5.5x² - 77x + 269.5 = 0 x1 = 7 , x2 = 7 |