| 1) | 2x2 -2x -4 = 0 | 2) | 5x2 + 20x + 15 = 0 |
| 3) | 3x2 -46x = 0 | 4) | 5x2 + 13x + 8 = 0 |
| 5) | 2x2 + 14x + 12 = 0 | 6) | 2x2 + 15x + 13 = 0 |
| 7) | 3x2 + 12x + 9 = 0 | 8) | 5x2 -x -6 = 0 |
| 9) | 2x2 -13x -15 = 0 | 10) | 2x2 -10x -12 = 0 |
| 11) | 3x2 + x -2 = 0 | 12) | 4x2 + 14x + 10 = 0 |
| 13) | 2x2 -7x -9 = 0 | 14) | 4x2 -7x -11 = 0 |
| 15) | 3x2 -3x -6 = 0 | 16) | 3x2 -2x -5 = 0 |
| 17) | 4x2 -2x -6 = 0 | 18) | 2x2 + x -1 = 0 |
| 19) | 5x2 + 4x -1 = 0 | 20) | 3x2 -8x -11 = 0 |
| 21) | 3x2 -7x -10 = 0 | 22) | 2x2 -3x -5 = 0 |
| 23) | 3x2 -x -4 = 0 | 24) | 3x2 + 5x + 2 = 0 |
| 25) | 2x2 -11x -13 = 0 | 26) | 2x2 -4x -6 = 0 |
| 27) | 3x2 -x -4 = 0 | 28) | 4x2 + 18x + 14 = 0 |
| 29) | 4x2 + 13x + 9 = 0 | 30) | 3x2 + 18x + 15 = 0 |
| 31) | 2x2 -9x -11 = 0 | 32) | 2x2 + 8x + 6 = 0 |
| 33) | 5x2 -7x -12 = 0 | 34) | 5x2 -9x -14 = 0 |
| 35) | 4x2 + 9x + 5 = 0 | 36) | 3x2 + 6x + 3 = 0 |
| 37) | 4x2 -7x -11 = 0 | 38) | 5x2 -4x -9 = 0 |
| 39) | 2x2 + 6x + 4 = 0 | 40) | 4x2 -10x -14 = 0 |
| 41) | 4x2 -2x -6 = 0 | 42) | 5x2 -30x = 0 |
| 43) | 3x2 + 13x + 10 = 0 | 44) | 2x2 + 7x + 5 = 0 |
| 45) | 4x2 + 6x + 2 = 0 | 46) | 3x2 + 16x + 13 = 0 |
| 47) | 4x2 + 14x + 10 = 0 | 48) | 2x2 + 10x + 8 = 0 |
| 49) | 3x2 + 14x + 11 = 0 | 50) | 5x2 -5x -10 = 0 |
Joke:
To err is human, to remember them in order, statistics; to plot them Excel!