( | 4 | − | x | ) | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 6 | + | 6 | − | 4 | ( | 5 | − | x | ) | − | 9 | ( | 6 | − | x | ) | − | ( | 4 | − | x | ) | = | 0 |
方程左边 = | ( | 4 | − | x | ) | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) | − | 9 | ( | 6 | − | x | ) | − | ( | 4 | − | x | ) |
( | 4 | − | x | ) | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) | − | 9 | ( | 6 | − | x | ) | − | ( | 4 | − | x | ) | = | 0 |
方程左边 = | 4 | ( | 6 | − | x | ) | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) | − | 9 | ( | 6 | − | x | ) | − | ( | 4 | − | x | ) |
= | 4 | × | 6 | ( | 5 | − | x | ) | − | 4 | x | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) |
= | 24 | ( | 5 | − | x | ) | − | 4 | x | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) | − | 9 |
= | 24 | × | 5 | − | 24 | x | − | 4 | x | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 |
= | 120 | − | 24 | x | − | 4 | x | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | + | 12 | − | 4 | ( | 5 | − | x | ) |
= | 132 | − | 24 | x | − | 4 | x | ( | 5 | − | x | ) | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | − | 4 | ( | 5 | − | x | ) | − | 9 |
= | 132 | − | 24 | x | − | 4 | x | × | 5 | + | 4 | x | x | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) |
= | 132 | − | 24 | x | − | 20 | x | + | 4 | x | x | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | − | 4 |
= | 132 | − | 44 | x | + | 4 | x | x | − | x | ( | 6 | − | x | ) | ( | 5 | − | x | ) | − | 4 | ( | 5 | − | x | ) | − | 9 |
= | 132 | − | 44 | x | + | 4 | x | x | − | x | × | 6 | ( | 5 | − | x | ) | + | x | x | ( | 5 | − | x | ) |
= | 132 | − | 44 | x | + | 4 | x | x | − | x | × | 6 | × | 5 | + | x | × | 6 | x |
= | 132 | − | 44 | x | + | 4 | x | x | − | x | × | 30 | + | x | × | 6 | x | + | x |
= | 132 | − | 74 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | ( | 5 | − | x | ) |
= | 132 | − | 74 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 132 | − | 74 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 132 | − | 74 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 112 | − | 70 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 112 | − | 70 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 112 | − | 70 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 58 | − | 61 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 58 | − | 61 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
= | 54 | − | 60 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 |
54 | − | 60 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 | = | 0 |
54 | − | 60 | x | + | 4 | x | x | + | x | × | 6 | x | + | x | x | × | 5 | = | 0 |
x1=9 |