| -10x² + 40x - 30 = 0 x1 = 1 , x2 = 3 | -6.5x² - 19.5x - 13 = 0 x1 = -2 , x2 = -1 |
| -7.5x² - 60x = 0 x1 = -8 , x2 = 0 | 4x² + 52x + 168 = 0 x1 = -7 , x2 = -6 |
| 9x² + 27x - 486 = 0 x1 = -9 , x2 = 6 | 3.5x² + 59.5x + 252 = 0 x1 = -9 , x2 = -8 |
| -8.5x² + 42.5x - 34 = 0 x1 = 1 , x2 = 4 | -8.5x² + 153x - 688.5 = 0 x1 = 9 , x2 = 9 |
| -2x² + 24x - 40 = 0 x1 = 2 , x2 = 10 | 0.5x² - 4.5x = 0 x1 = 0 , x2 = 9 |
| -2.5x² - 5x + 87.5 = 0 x1 = -7 , x2 = 5 | -6x² - 42x + 48 = 0 x1 = -8 , x2 = 1 |
| 6x² - 108x + 486 = 0 x1 = 9 , x2 = 9 | -3.5x² - 21x + 56 = 0 x1 = -8 , x2 = 2 |
| 2.5x² + 30x + 90 = 0 x1 = -6 , x2 = -6 | -10x² - 80x + 90 = 0 x1 = -9 , x2 = 1 |
| 4x² - 16x - 128 = 0 x1 = -4 , x2 = 8 | 9x² - 117x + 378 = 0 x1 = 6 , x2 = 7 |
| 1.5x² + 13.5x + 12 = 0 x1 = -8 , x2 = -1 | -2x² - 28x - 96 = 0 x1 = -8 , x2 = -6 |