Question

If `[9-1 4-2 1 3]=A+[1 2-1 0 4 9],` then find the matrix `Adot`

Answer 1

Clearly, we have
`A=[{:(9,-1,4),(-2," "1,3):}]-[{:(1,2,-1),(0,4," "9):}]`
`=[{:(" "9-1,-1-2," "4+1),(-2-0," "1-4," "3-9):}]=[{:(8,-3," "5),(-2,-3,-6):}].`