Cho dạng toàn phương Q: R3 -> R  xác định bởi \[(x,y) = 2{x^2} - 6xy + {y^2}\].Tìm ma trận của Q trong cơ sở \[\left\{ {v1 = \left( {1,0} \right),v2 = \left( {1,1} \right)} \right\}\]

\[\left( {\begin{array}{*{20}{c}}\begin{array}{l}2\\ - 3\end{array}&\begin{array}{l} - 3\\1\end{array}\end{array}} \right)\]

\[\left( {\begin{array}{*{20}{c}}\begin{array}{l}2\\ - 1\end{array}&\begin{array}{l} - 1\\ - 3\end{array}\end{array}} \right)\]

\[\left( {\begin{array}{*{20}{c}}\begin{array}{l}2\\ - 6\end{array}&\begin{array}{l} - 6\\1\end{array}\end{array}} \right)\]

\[\left( {\begin{array}{*{20}{c}}\begin{array}{l}2\\0\end{array}&\begin{array}{l} - 6\\1\end{array}\end{array}} \right)\]