| ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | ( | 7 4 | − | x | ) | ( | 13 4 | − | 3 2 | x | ) | ( | 7 4 | − | x | ) | ( | 13 4 | − | 3 2 | x | ) | ( | 13 4 | − | 3 2 | x | ) | = | 0 |
| 方程左边 = | 21 10 | ( | 79 10 | − | 3 2 | x | ) | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | x | ( | 79 10 | − | 3 2 | x | ) | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | ( | 7 4 | − | x | ) | ( | 13 4 | − | 3 2 | x | ) |
| = | 21 10 | × | 79 10 | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 21 10 | × | 3 2 | x | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | x |
| = | 1659 100 | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | x | ( | 79 10 | − | 3 2 | x | ) | ( | 21 10 | − | x | ) |
| = | 1659 100 | × | 21 10 | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) |
| = | 34839 1000 | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x | ( | 21 10 | − | x | ) | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) |
| = | 34839 1000 | × | 79 10 | ( | 79 10 | − | 3 2 | x | ) | − | 34839 1000 | × | 3 2 | x | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 |
| = | 2752281 10000 | ( | 79 10 | − | 3 2 | x | ) | − | 104517 2000 | x | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x | ( | 21 10 | − | x | ) |
| = | 2752281 10000 | × | 79 10 | − | 2752281 10000 | × | 3 2 | x | − | 104517 2000 | x | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) |
| = | 217430199 100000 | − | 8256843 20000 | x | − | 104517 2000 | x | ( | 79 10 | − | 3 2 | x | ) | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x |
| = | 217430199 100000 | − | 8256843 20000 | x | − | 104517 2000 | x | × | 79 10 | + | 104517 2000 | x | × | 3 2 | x | − | 1659 100 | x |
| = | 217430199 100000 | − | 8256843 20000 | x | − | 8256843 20000 | x | + | 313551 4000 | x | x | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) |
| = | 217430199 100000 | − | 8256843 10000 | x | + | 313551 4000 | x | x | − | 1659 100 | x | ( | 79 10 | − | 3 2 | x | ) | ( | 79 10 | − | 3 2 | x | ) | − | 63 20 | x |
| = | 217430199 100000 | − | 8256843 10000 | x | + | 313551 4000 | x | x | − | 1659 100 | x | × | 79 10 | ( | 79 10 | − | 3 2 | x | ) | + | 1659 100 | x |
| = | 217430199 100000 | − | 8256843 10000 | x | + | 313551 4000 | x | x | − | 131061 1000 | x | ( | 79 10 | − | 3 2 | x | ) | + | 4977 200 | x | x |
| = | 217430199 100000 | − | 8256843 10000 | x | + | 313551 4000 | x | x | − | 131061 1000 | x | × | 79 10 | + | 131061 1000 | x | × | 3 2 |
| = | 217430199 100000 | − | 8256843 10000 | x | + | 313551 4000 | x | x | − | 10353819 10000 | x | + | 393183 2000 | x | x | + | 4977 200 |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 4977 200 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 4977 200 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |
| = | 217430199 100000 | − | 9305331 5000 | x | + | 313551 4000 | x | x | + | 393183 2000 | x | x | + | 393183 2000 | x | x |