If the trace of two matrices A=[2a2539−6b] and B=[−b2538a−8] are – InterviewSolution

1.	If the trace of two matrices A=[2a2539−6b] and B=[−b2538a−8] are equal,where a,b∈R, then 2a−b equals to
Answer» If the trace of two matrices $A = [\begin{matrix} 2 a^{2} & 5 3 & 9 - 6 b \end{matrix}]$ and $B = [\begin{matrix} - b^{2} & 5 3 & 8 a - 8 \end{matrix}]$ are equal,where $a, b \in R,$ then $2 a - b$ equals to

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