Alguém pode ajudar:
Resolver as equações U = R²:
![\left[\begin{array}{ccc}x-y&2&\\3&2x+y&\\&&\end{array}\right] = \left[\begin{array}{ccc}1& \frac{x}{2} &\\y&11&\\&&\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dx-y%26amp%3B2%26amp%3B%5C%5C3%26amp%3B2x%2By%26amp%3B%5C%5C%26amp%3B%26amp%3B%5Cend%7Barray%7D%5Cright%5D++++%3D+++++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26amp%3B+%5Cfrac%7Bx%7D%7B2%7D+%26amp%3B%5C%5Cy%26amp%3B11%26amp%3B%5C%5C%26amp%3B%26amp%3B%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}x-y&2&\\3&2x+y&\\&&\end{array}\right] = \left[\begin{array}{ccc}1& \frac{x}{2} &\\y&11&\\&&\end{array}\right]")
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Valeu !
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