The trace of a square matrix is defined as the sum of the principal di – InterviewSolution

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1.	The trace of a square matrix is defined as the sum of the principal diagonal elements. For real numbers a and b, if the trace of matrices A=[2a2539−6b] and B=[−b2238a−8] are equal, then 2a−b is equal to
Answer» The trace of a square matrix is defined as the sum of the principal diagonal elements. For real numbers $a$ and $b,$ if the trace of matrices $A = [\begin{matrix} 2 a^{2} & 5 3 & 9 - 6 b \end{matrix}]$ and $B = [\begin{matrix} - b^{2} & 2 3 & 8 a - 8 \end{matrix}]$ are equal, then $2 a - b$ is equal to

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