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% Example 1
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A = [2 5; -3 -7]
C = [-7 -5; 3 2]
A * C
C * A

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% Example 2
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A = [3 4; 5 6]
inv(A)

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% Example 3
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A = [3 4; 5 6]
b = [3 7]'
inv(A) * b
A \ b
