 |
2 |
-1 |
 |
| 1 |
3 |
|
|
= |
|
- Each entry in the first row of the answer was obtained by multiplying the row [ 2 -1 ] by the column with the corresponding color.
- Each entry in the second row of the answer was obtained by multiplying the row [ 1 3 ] by the column with the corresponding color.
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