Question

If `3"A" - "B" = [(5,0),(1,1)] and "B" = [(4,3),(2,5)]`, then find the martix A.

Answer 1

`3"A" - "B" = [(5,0),(1,1)]`

We need to calculate A.

`3"A" = [(5,0),(1,1)] + "B"`

`"B" = [(4,3),(2,5)]`

`3"A" = [(9,3),(3,6)]`

`"A" = (1)/(3) [(9,3),(3,6)]`

`"A" = [(3,1),(1,2)]`