Yes.
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8
You can only add a 3x3 matrix to another matrix of the same size. The reuslt is a 3x3 matrix where each element is the sum of the elements in the corresponding positions in the two summand matrices.Symbolically,if A = {aij} and B = {bij} then A + B = {aij + bij}where i=1,2,3 and j = 1,2,3
14
It would be no different. Matrix addition is Abelian or commutative. Matrix mutiplication is not.
the answer is 8;)