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Question
Let `A = [(2,4),(3,2)] , B = [(1,3),(-2,5)], C = [(-2,5),(3,4)]`
Find 3A - C
Sum
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Solution
`3A -C = 3 [(2,4),(3,2)]-[(-2,5),(3,4)]`
`=[(3xx2,3xx4),(3xx3,3xx2)]-[(-2,5),(3,4)]`
`=[(6,12),(9,6)]-[(-2,5),(3,4)]`
`=[(6+2, 12-5),(9-3, 6-4)]`
`=[(8,7),(6,2)]`
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