| 1.5x² - 13.5x = 0 x1 = 0 , x2 = 9 | 3.5x² + 42x + 122.5 = 0 x1 = -7 , x2 = -5 |
| 5x² - 30x - 200 = 0 x1 = -4 , x2 = 10 | 3.5x² - 24.5x = 0 x1 = 0 , x2 = 7 |
| -6x² + 48x = 0 x1 = 0 , x2 = 8 | -1.5x² + 9x + 40.5 = 0 x1 = -3 , x2 = 9 |
| 8.5x² - 17x - 68 = 0 x1 = -2 , x2 = 4 | -x² + 36 = 0 x1 = -6 , x2 = 6 |
| 5x² - 85x + 350 = 0 x1 = 7 , x2 = 10 | -7x² + 21x + 196 = 0 x1 = -4 , x2 = 7 |
| -3x² + 27x - 42 = 0 x1 = 2 , x2 = 7 | -2.5x² + 5x + 157.5 = 0 x1 = -7 , x2 = 9 |
| -4.5x² - 9x + 13.5 = 0 x1 = -3 , x2 = 1 | 2.5x² - 122.5 = 0 x1 = -7 , x2 = 7 |
| -10x² - 70x + 180 = 0 x1 = -9 , x2 = 2 | 2.5x² - 22.5x + 50 = 0 x1 = 4 , x2 = 5 |
| -6.5x² - 71.5x - 65 = 0 x1 = -10 , x2 = -1 | 2.5x² + 7.5x - 10 = 0 x1 = -4 , x2 = 1 |
| -2x² - 36x - 160 = 0 x1 = -10 , x2 = -8 | -7.5x² + 30x + 450 = 0 x1 = -6 , x2 = 10 |