| 5.5x² - 82.5x + 297 = 0 x1 = 6 , x2 = 9 | -10x² - 160x - 630 = 0 x1 = -9 , x2 = -7 |
| -3.5x² - 14x + 210 = 0 x1 = -10 , x2 = 6 | -9.5x² + 85.5x + 95 = 0 x1 = -1 , x2 = 10 |
| -1.5x² + 4.5x + 81 = 0 x1 = -6 , x2 = 9 | 6x² - 84x + 270 = 0 x1 = 5 , x2 = 9 |
| -8x² - 104x - 320 = 0 x1 = -8 , x2 = -5 | 0.5x² - x - 4 = 0 x1 = -2 , x2 = 4 |
| 5.5x² - 11x = 0 x1 = 0 , x2 = 2 | 5.5x² - 5.5x - 110 = 0 x1 = -4 , x2 = 5 |
| -1.5x² - 12x = 0 x1 = -8 , x2 = 0 | 4x² - 4x - 80 = 0 x1 = -4 , x2 = 5 |
| 4x² + 64x + 240 = 0 x1 = -10 , x2 = -6 | 6.5x² - 45.5x + 65 = 0 x1 = 2 , x2 = 5 |
| -x² + 15x - 50 = 0 x1 = 5 , x2 = 10 | 6.5x² - 65x + 162.5 = 0 x1 = 5 , x2 = 5 |
| 7.5x² + 60x + 120 = 0 x1 = -4 , x2 = -4 | -x² - 8x = 0 x1 = -8 , x2 = 0 |
| 4x² - 60x + 216 = 0 x1 = 6 , x2 = 9 | -9x² - 72x - 108 = 0 x1 = -6 , x2 = -2 |