Evaluate the following : \[ \left[\begin{array}{lll} x & y & z \end...

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Evaluate the following :
\[
\left[\begin{array}{lll}
x & y & z
\end{array}\right]\left[\begin{array}{lll}
a & h & g \\
h & b & f \\
g & f & c
\end{array}\right]\left[\begin{array}{l}
x \\
y \\
z
\end{array}\right]
\]
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