( | X | + | 1 | ) | ( | X | + | 2 | ) | ( | X | + | 3 | ) | ( | X | + | 4 | ) | = | 8 |
Left side of the equation = | X | ( | X | + | 2 | ) | ( | X | + | 3 | ) | ( | X | + | 4 | ) | + | 1 | ( | X | + | 2 | ) | ( | X | + | 3 | ) | ( | X | + | 4 | ) |
= | X | X | ( | X | + | 3 | ) | ( | X | + | 4 | ) | + | X | × | 2 | ( | X | + | 3 | ) | ( | X | + | 4 | ) | + | 1 | ( | X | + | 2 | ) | ( | X | + | 3 | ) | ( | X | + | 4 | ) |
= | X | X | X | ( | X | + | 4 | ) | + | X | X | × | 3 | ( | X | + | 4 | ) | + | X | × | 2 | ( | X | + | 3 | ) | ( | X | + | 4 | ) |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | ( | X | + | 4 | ) |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |
= | X | X | X | X | + | X | X | X | × | 4 | + | X | X | × | 3 | X |