Toán hữu hạn Ví dụ

$[\begin{array}{c} 1 & 2 \\ 3 & 4 \end{array}] = [\begin{array}{c} x \\ y \end{array}] [\begin{array}{c} - 1 \\ 4 \end{array}]$

Bước 1

$[\begin{array}{c} 1 & 2 \\ 3 & 4 \end{array}] = [\begin{array}{c} x \\ y \end{array}] [\begin{array}{c} - 1 \\ 4 \end{array}]$