Recall that to be able to add or subtract two matrices, they have to be the same size.
Therefore:
1) A 3x2 matrix and a 2x4 matrix have not the same size, therefore you cannot add them.
2) A 1x2 matrix and a 1x2 matrix have the same size, therefore you can subtract them.
3) A 2x4 matrix and a 4x2 matrix have not the same size, therefore you cannot subtract them.
Answer:
1) False.
2) True.
3) False.
