∴2x2+3x=1,
原式=
| 2x−3 |
| 2x(2x−1) |
| (2x+1)(2x−1)−8 |
| 2x−1 |
=
| 2x−3 |
| 2x(2x−1) |
| 2x−1 |
| 4x2−9 |
=
| 2x−3 |
| 2x(2x−1) |
| 2x−1 |
| (2x+3)(2x−3) |
=
| 1 |
| 2x(2x+3) |
=
| 1 |
| 2(2x2+3x) |
当2x2+3x=1时,原式=
| 1 |
| 2×1 |
| 1 |
| 2 |
| 2x−3 |
| 4x2−2x |
| 8 |
| 2x−1 |
| 2x−3 |
| 2x(2x−1) |
| (2x+1)(2x−1)−8 |
| 2x−1 |
| 2x−3 |
| 2x(2x−1) |
| 2x−1 |
| 4x2−9 |
| 2x−3 |
| 2x(2x−1) |
| 2x−1 |
| (2x+3)(2x−3) |
| 1 |
| 2x(2x+3) |
| 1 |
| 2(2x2+3x) |
| 1 |
| 2×1 |
| 1 |
| 2 |