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OpenStudy (ashleyisakitty):
Find -3A+6B
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OpenStudy (ashleyisakitty):
OpenStudy (anonymous):
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OpenStudy (anonymous):
\[-3\left[\begin{matrix}-3 & 5& -6 \\ 9 & -5 & 3\end{matrix}\right]+6\left[\begin{matrix}-2 & 6 & 7\\ 2 & -1& -6\end{matrix}\right]\\ =\left[\begin{matrix}9 & -15& 18 \\ -27 & 15 & -15\end{matrix}\right]+\left[\begin{matrix}-12 & 36 & 42\\ 12 & -6& -36\end{matrix}\right]\\=\left[\begin{matrix}-3 & 21 &60\\ -15 & 9&-51\end{matrix}\right]\]
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