Question on: JAMB Mathematics - 2007

Evaluate(\begin{pmatrix} 3 & -2 \ -7 & 5\end{pmatrix}) + 2(\begin{pmatrix} -2 & 4 \ 3 & -1\end{pmatrix})

A
\(\begin{pmatrix}-1 & 6 \ -1 & 3\end{pmatrix}\)
B
\(\begin{pmatrix} 3 & 4 \ -2 & 6\end{pmatrix}\)
C
\(\begin{pmatrix} -1 & 6 \ 1 & 3\end{pmatrix}\)
D
\(\begin{pmatrix} 3 & 4 \ 2 & 6\end{pmatrix}\)
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Correct Option: A

(\begin{pmatrix} 3 & -2 \ -7 & 5\end{pmatrix}) + 2(\begin{pmatrix} -2 & 4 \ 3 & -1\end{pmatrix}) = (\begin{pmatrix} 3 & -2 \ -7 & 5\end{pmatrix}) + (\begin{pmatrix} -4 & 8 \ 6 & -2\end{pmatrix})

= (\begin{pmatrix} 3 & -4 \ -7 & 6\end{pmatrix}) + 2(\begin{pmatrix} -2 & 8 \ 5 & -2\end{pmatrix})

= (\begin{pmatrix}-1 & 6 \ -1 & 3\end{pmatrix})

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