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Consider `A` and `B` as `2xx2` matrices with determinant equal to 1 then `tr(AB)-tr(A).tr(B)+tr(AB^(-1))+2` is_______

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Consider `A` and `B` as `2xx2` matrices with determinant equal to 1 then
`tr(AB)-tr(A).tr(B)+tr(AB^(-1))+2` is_______
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`B^(2)-tr(B).B+l=0`
`impliesAB-(tr(B)A+AB^(-1)=0`
`:. Tr(AB)-tr(A)tr(B)+tr(AB^(-1))=0`
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