Let \( \mathrm{A}=\left[\begin{array}{c}3 x^{2} \\ 1 \\ 6 x\end{array}\right], \mathrm{B}=[a b c... VIDEO
Let \( \mathrm{A}=\left[\begin{array}{c}3 x^{2} \\ 1 \\ 6 x\end{array}\right], \mathrm{B}=[a b c] \) and
\[
\mathrm{C}=\left[\begin{array}{ccc}
(x+2)^{2} & 5 x^{2} & 2 x \\
5 x^{2} & 2 x & (x+1)^{2} \\
2 x & (x+2)^{2} & 5 x^{2}
\end{array}\right]
\]
Where \( a, b, c \) and \( x \in \mathrm{R} \), Given that \( \operatorname{tr}(\mathrm{AB})=\operatorname{tr}(\mathrm{C}) \), then the value of \( (a+b+c) \)
(a) 7
(b) 2
(c) 1
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