Subtraction of Matrices

The subtraction of matrices is basically like matrix addition. You just subtract them instead of adding. For example:

        [3  7  5]               [5  2  9]

A =   [2  0  6]        B = [4  7  1]

        [8  9  1]               [3  2  6]

Where we have to solve A - B.

The solution is simply

      [ 3 - 5   7 - 2   5 - 9 ]  

      [ 2 - 4   0 - 7   6 - 1 ]

      [ 8 - 3   9 - 2   1 - 6 ]

         [ -2   5   -4 ]

     =  [ -2  -7    5 ]

         [  5   7   -5 ]

Like addition, we also cannot subtract matrices that have different sizes such as

       [ 7 ]

A = [ 2 ]    and     B = [  3  4  6  ]

       [ 4 ]