| -3x² - 18x + 81 = 0 x1 = -9 , x2 = 3 | 3x² + 42x + 135 = 0 x1 = -9 , x2 = -5 |
| -5x² + 75x - 270 = 0 x1 = 6 , x2 = 9 | 9x² + 54x + 72 = 0 x1 = -4 , x2 = -2 |
| 5x² - 70x + 200 = 0 x1 = 4 , x2 = 10 | -4.5x² - 13.5x + 45 = 0 x1 = -5 , x2 = 2 |
| -7x² - 42x = 0 x1 = -6 , x2 = 0 | -4x² + 28x + 120 = 0 x1 = -3 , x2 = 10 |
| 6x² - 18x - 24 = 0 x1 = -1 , x2 = 4 | -2x² - 6x + 36 = 0 x1 = -6 , x2 = 3 |
| 8x² + 72x + 112 = 0 x1 = -7 , x2 = -2 | -3x² - 12x + 15 = 0 x1 = -5 , x2 = 1 |
| -x² + 16 = 0 x1 = -4 , x2 = 4 | 1.5x² = 0 x1 = 0 , x2 = 0 |
| 9x² + 18x - 432 = 0 x1 = -8 , x2 = 6 | -8.5x² + 42.5x = 0 x1 = 0 , x2 = 5 |
| 4x² - 4 = 0 x1 = -1 , x2 = 1 | -10x² + 10x + 300 = 0 x1 = -5 , x2 = 6 |
| 9.5x² - 9.5x - 285 = 0 x1 = -5 , x2 = 6 | 2x² - 2x = 0 x1 = 0 , x2 = 1 |