[Further Mathematics extra work, Matrices]

[u/Happerflu]

The second picture is my incomplete attempt of this question
Please help I’d be eternally thankful

[u/swiftaw77]

Yeah, neither of your answers so far are correct. Remember, for a 3x3 matrix, i and j taken the values 1,2, and 3, so for A you need to calculate i+j for all combinations, similarly i-j for B