Linear Algebra:
Special Matrix Types
Which of the following matrices is symmetric?
\[\begin{aligned}
\text{Matrix } A : &\matrix{25 & 9 \\ -3 & -21} \\
\\
\text{Matrix } B : &\matrix{23 & 39 & -12 \\ 39 & -19 & -1 \\ -12 & -1 & 47} \\
\\
\text{Matrix } C : &\matrix{-47 & 0 & 12 \\ 0 & -15 & 14 \\ 12 & 14 & 39}
\end{aligned}\]
\[\begin{aligned}
\text{Matrix } A : &\matrix{25 & 9 \\ -3 & -21} \\
\\
\text{Matrix } B : &\matrix{23 & 39 & -12 \\ 39 & -19 & -1 \\ -12 & -1 & 47} \\
\\
\text{Matrix } C : &\matrix{-47 & 0 & 12 \\ 0 & -15 & 14 \\ 12 & 14 & 39}
\end{aligned}\]
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