Question 175431
I'm guessing on the make up of the matrices.
First off let's look at [C][F].
[C]={{{(matrix(2,3,12,0,1.5,1,-6,7))}}}
[F]={{{(matrix(3,2,-2,0,0,8,2,1))}}}
[C][F]={{{(matrix(2,2,-21,1.5,12,-41))}}}
where each element of [C][F] comes from multiplying a row of [C] with a column of [F].
Example: First element is product of first row and first column.
{{{CF[1,1]=12*-2+0*0+1.5*2=-24+3=-21}}}
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Now that we have [C][F], we can subtract it from [B], element by element,
[B]-[C][F]={{{(matrix(2,2,2,8,.6,3))-(matrix(2,2,-21,1.5,12,-41))}}}
[B]-[C][F]={{{(matrix(2,2,23,6.5,-11.4,44))}}}
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If this is not how the matrices look,please re-state the problem and be more specific about the make up of the matrices (rows x columns).
Here's an example.
[A] is a 2x2 matrix. A=[1,2,3,4].
The assumption is that [A] looks like this,
[A]={{{(matrix(2,2,1,2,3,4))}}}
[B] is a 3x2 matrix. B=[5,6,7,8,9,10]
[B]={{{(matrix(3,2,5,6,7,8,9,10))}}}