Question #255444
The subraction of a matrix B may be considered as the addition of the matrix(-1)B.Does the commutative law of addition permit us to state that A-B=B-A?If not,how would you correct the statement?
Expert's answer
If the subtraction A - B is considered a the addition A + (-B), then the commutative law should be stated as follows :
A + (-B) = (-B) + A.
That is, A - B = -B + A.
Thus, the corrected statement is A - B = -B + A, not B - A.
