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

Answer 1

`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]]`