যদি $A=\left[\begin{array}{cc}2& 1\\ 3& 2\end{array}\right],c=\left[\begin{array}{cc}-2& 1\\ 5& -2\end{array}\right]$ এবং $ABC=\left[\begin{array}{cc}-2& 4\\ 3& -1\end{array}\right]$ হয়, তাহলে B = ?

Question:

যদি $A=\left[\begin{array}{cc}2& 1\\ 3& 2\end{array}\right],c=\left[\begin{array}{cc}-2& 1\\ 5& -2\end{array}\right]$ এবং $ABC=\left[\begin{array}{cc}-2& 4\\ 3& -1\end{array}\right]$ হয়, তাহলে B = ?