Let A=[abcd] and B[αβ]≠[00] such that AB=B and a+d=2021, then the – InterviewSolution

1.	Let A=[abcd] and B[αβ]≠[00] such that AB=B and a+d=2021, then the value of ad−bc is equal to
Answer» Let $A = [\begin{matrix} a & b c & d \end{matrix}]$ and $B [\begin{matrix} α β \end{matrix}]$ $\neq [\begin{matrix} 00 \end{matrix}]$ such that $A B = B$ and $a + d = 2021,$ then the value of $a d - b c$ is equal to

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