Question:
If $\mathrm{A}=\left[\begin{array}{cc}2 & -3 \\ 4 & 5\end{array}\right]$ and $\mathrm{B}=\left[\begin{array}{cc}-1 & 2 \\ 0 & 3\end{array}\right]$, find a matrix $\mathrm{X}$ such that $\mathrm{A}+2 \mathrm{~B}+\mathrm{X}=\mathrm{O}$
Solution:
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