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If P=[{:(,1,2),(,2,-1):}] and Q=[{:(,1,0),(,2,1):}] then compute : (i) P^2-Q^2 (ii) (P+Q) (P-Q) Is (P+Q) (P-Q) =P^2-Q^2 true for matrix algebra?

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ANSWER :(i) `[{:(,4,0),(,-4,4):}]` (II) `[{:(,0,0),(,0,8):}]; No`


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