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[-3 4] [5] = [-15+8] = [-7]
[2]
untuk no 1 b)
[1 -2] [3 1] = [3 9]
[0 -4]
untuk no 2 a)
[-3 -1][-3 -1] = [7 -1]
[2 4] [2 4] [2 14]
untuk no 2 b)
[7 -1] [-3 -1] = [-23 -11]
[2 14] [2 4] [22 54]