If a matrix A=[aij]2×2 is formed, whose aij is either 0,1 or 2 and a1 – InterviewSolution

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1.	If a matrix A=[aij]2×2 is formed, whose aij is either 0,1 or 2 and a11a22+a12a21=0, then the number of such different matrices is
Answer» If a matrix $A = {[a_{i j}]}_{2 \times 2}$ is formed, whose $a_{i j}$ is either $0, 1$ or $2$ and $a_{11} a_{22} + a_{12} a_{21} = 0,$ then the number of such different matrices is

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