Q.If $A = \begin{pmatrix} 1 & 0 & 0 \ 0 & 1 & 0 \ 0 & 0 & -1 \end{pmatrix}$ and $B = \begin{pmatrix} 0 & 0 & 1 \ 0 & -1 & 0 \ 1 & 0 & 0 \end{pmatrix}$ , then $AB + BA$ equals

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Q.If A=(100 010 00−1)A = \begin{pmatrix} 1 & 0 & 0 \ 0 & 1 & 0 \ 0 & 0 & -1 \end{pmatrix}A=(1​0​0 0​1​0 0​0​−1​) and B=(001 0−10 100)B = \begin{pmatrix} 0 & 0 & 1 \ 0 & -1 & 0 \ 1 & 0 & 0 \end{pmatrix}B=(0​0​1 0​−1​0 1​0​0​), then AB+BAAB + BAAB+BA equals