Multiply each row in the first matrix by each column in the second matrix .

Simplify each element of the matrix by multiplying out all the expressions.

Multiply each row in the first matrix by each column in the second matrix .

Simplify each element of the matrix by multiplying out all the expressions.

is in the most simplified form.

Simplify [[6,4,-2],[0,2,6],[4,0,6]][[1,0,0],[0,1,0],[0,0,1]][[1,2,0],[0,-1,-2],[1,3,1]]