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Ray Morgan
For two 2 ×2 matrices 𝐀 and 𝐁, by explicit calculation, show that …
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Janusz
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![Let P=[√3\/2 1\/2][-1\/2 √3\/2] A=[1 1][0 1] and Q=PAP^T. If P^TQ^2007P=[a b][c d] then 2a+b-3c-4d equal](http://i.ytimg.com/vi/JbkyALCWZXY/mqdefault.jpg "Let P=[√3\/2 1\/2][-1\/2 √3\/2] A=[1 1][0 1] and Q=PAP^T. If P^TQ^2007P=[a b][c d] then 2a+b-3c-4d equal")