Linear Algebra
Special Matrix Types
Which of the following matrices is symmetric?
\[\begin{aligned}
\text{Matrix } A : &\matrix{42 & 28 \\ 28 & -5} \\
\\
\text{Matrix } B : &\matrix{21 & -44 & -1 \\ -44 & 7 & -20 \\ -1 & -20 & -30} \\
\\
\text{Matrix } C : &\matrix{-44 & -19 & 29 \\ -43 & 50 & 20 \\ -8 & -36 & -46}
\end{aligned}\]
\[\begin{aligned}
\text{Matrix } A : &\matrix{42 & 28 \\ 28 & -5} \\
\\
\text{Matrix } B : &\matrix{21 & -44 & -1 \\ -44 & 7 & -20 \\ -1 & -20 & -30} \\
\\
\text{Matrix } C : &\matrix{-44 & -19 & 29 \\ -43 & 50 & 20 \\ -8 & -36 & -46}
\end{aligned}\]
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