| 2.5x² - 7.5x - 25 = 0 x1 = -2 , x2 = 5 | -9x² - 81x = 0 x1 = -9 , x2 = 0 |
| 9x² + 153x + 648 = 0 x1 = -9 , x2 = -8 | -1.5x² - 19.5x - 54 = 0 x1 = -9 , x2 = -4 |
| -5x² + 10x + 75 = 0 x1 = -3 , x2 = 5 | 9x² + 27x + 18 = 0 x1 = -2 , x2 = -1 |
| 3x² - 6x - 189 = 0 x1 = -7 , x2 = 9 | -4.5x² - 49.5x - 108 = 0 x1 = -8 , x2 = -3 |
| x² + 3x - 4 = 0 x1 = -4 , x2 = 1 | -8.5x² - 59.5x - 51 = 0 x1 = -6 , x2 = -1 |
| -3x² - 12x + 96 = 0 x1 = -8 , x2 = 4 | -3x² - 54x - 240 = 0 x1 = -10 , x2 = -8 |
| 5.5x² + 60.5x + 154 = 0 x1 = -7 , x2 = -4 | -6.5x² - 26x + 136.5 = 0 x1 = -7 , x2 = 3 |
| -9.5x² + 171x - 760 = 0 x1 = 8 , x2 = 10 | 2.5x² - 12.5x - 125 = 0 x1 = -5 , x2 = 10 |
| 9x² - 117x + 378 = 0 x1 = 6 , x2 = 7 | 8x² - 128 = 0 x1 = -4 , x2 = 4 |
| -1.5x² + 25.5x - 108 = 0 x1 = 8 , x2 = 9 | -0.5x² + 8x - 30 = 0 x1 = 6 , x2 = 10 |