$\Delta=\left|\begin{array}{ll}\mathbf{k}_{11} & \mathbf{k}_{12} \\\mathbf{k}_{21} & \mathbf{k}_{22}\end{array}\right|$ হলে $\mathrm{m} \Delta=$ কত ?

$\left|\begin{array}{ll}m_{11} & k_{12} \\m_{21} & k_{22}\end{array}\right|$

$\left|\begin{array}{cc}\mathrm{k}_{11} & \mathrm{mk}_{12} \\\mathrm{~m}_{21} & \mathrm{k}_{22}\end{array}\right|^{}$

$\left|\begin{array}{cc}\mathrm{mk}_{11} & \mathrm{k}_{12} \\\mathrm{k}_{21} & \mathrm{mk}_{22}\end{array}\right|$

$\left|\begin{array}{ll}\mathrm{mk}_{11} & \mathrm{mk}_{12} \\\mathrm{mk}_{21} & \mathrm{mk}_{22}\end{array}\right| .$