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[[-1,2],[-2,3]]-[[1,2],[3,-3]]=

[−12−23]−[123−3]= \left[\begin{array}{cc}-1 & 2 \\ -2 & 3\end{array}\right]-\left[\begin{array}{cc}1 & 2 \\ 3 & -3\end{array}\right]=

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Full solution

Q. [−12−23]−[123−3]= \left[\begin{array}{cc}-1 & 2 \\ -2 & 3\end{array}\right]-\left[\begin{array}{cc}1 & 2 \\ 3 & -3\end{array}\right]=
  1. Subtract First Row/Column Elements: Subtract the elements in the first row and first column of the matrices.\newline(−1)−(1)=−2(-1) - (1) = -2\newline2−2=02 - 2 = 0
  2. Subtract First Row/Second Column Elements: Subtract the elements in the first row and second column of the matrices.\newline(−2)−(3)=−5(-2) - (3) = -5\newline3−(−3)=63 - (-3) = 6

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