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Question
Let A = `[[2,4],[3,2]]`, `B=[[1,3],[-2,5]]`and `c =[[-2,5],[3,4]]`.Find each of the following: 3A − C
Solution
`3A -C `
⇒3A−C=3 `[[2 4],[3 2]]-[[-2 5],[3 4]]`
⇒3A−C=`[[6 12],[9 6]]-[[-2 5],[3 4]]`
⇒3A−C=`[[6 +2 12-5],[9-3 6-4]]`
⇒3A−C=`[[8 7],[6 2]]`
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