document.write( "Question 148897: If A is a 3 × 4 matrix, B is a 4 × 12 matrix, and C is a 12 × 2 matrix, then A + B − C = ?? \n" ); document.write( "

Algebra.Com's Answer #109232 by jim_thompson5910(35256) $\"\"$ $\"About$

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You cannot add and subtract matrices of different sizes. If B was 3 x 4 and C was 3 x 4, then you could perform the operations. \n" ); document.write( "

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