Given the matrices A and B shown below, find A-B

Question

A= [ -4, 5] B=[ 4, 5]

Answer 1

To add or subtract matrices, they must be of the same dimensions. These two are, so the subtraction is straight forward. A general formula would be if A = [ a₁ , a₂ ] and B = [ b₁ , b₂ ] then A - B = [ (a₁ - b₁) , (a₂ - b₂) ]. In your specific problem A - B = [ -8 , 0 ].