Linear Algebra:
Special Matrix Types
Which of the following matrices is symmetric?
\[\begin{aligned}
\text{Matrix } A : &\matrix{13 & 21 \\ 21 & -21} \\
\\
\text{Matrix } B : &\matrix{50 & -9 & 25 \\ -8 & 48 & -24 \\ -50 & 9 & 23} \\
\\
\text{Matrix } C : &\matrix{27 & -50 & 27 \\ -50 & -4 & 7 \\ 27 & 7 & -48}
\end{aligned}\]
\[\begin{aligned}
\text{Matrix } A : &\matrix{13 & 21 \\ 21 & -21} \\
\\
\text{Matrix } B : &\matrix{50 & -9 & 25 \\ -8 & 48 & -24 \\ -50 & 9 & 23} \\
\\
\text{Matrix } C : &\matrix{27 & -50 & 27 \\ -50 & -4 & 7 \\ 27 & 7 & -48}
\end{aligned}\]
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