| 7x² + 70x = 0 x1 = -10 , x2 = 0 | 7x² + 7x - 14 = 0 x1 = -2 , x2 = 1 |
| -3x² = 0 x1 = 0 , x2 = 0 | 10x² - 40x - 210 = 0 x1 = -3 , x2 = 7 |
| -2x² + 2x = 0 x1 = 0 , x2 = 1 | 2x² - 6x - 8 = 0 x1 = -1 , x2 = 4 |
| -6x² + 12x + 144 = 0 x1 = -4 , x2 = 6 | -1.5x² + 7.5x + 21 = 0 x1 = -2 , x2 = 7 |
| -4.5x² + 9x = 0 x1 = 0 , x2 = 2 | -6.5x² + 6.5x + 468 = 0 x1 = -8 , x2 = 9 |
| -5.5x² - 27.5x + 275 = 0 x1 = -10 , x2 = 5 | -10x² + 10x = 0 x1 = 0 , x2 = 1 |
| 9x² - 27x - 486 = 0 x1 = -6 , x2 = 9 | -5x² + 80 = 0 x1 = -4 , x2 = 4 |
| -7x² + 7x + 294 = 0 x1 = -6 , x2 = 7 | -9.5x² + 66.5x = 0 x1 = 0 , x2 = 7 |
| 7x² + 91x + 294 = 0 x1 = -7 , x2 = -6 | -7.5x² + 30x = 0 x1 = 0 , x2 = 4 |
| 8.5x² + 51x + 76.5 = 0 x1 = -3 , x2 = -3 | 8x² - 32 = 0 x1 = -2 , x2 = 2 |