Question: -4 4 4 If A = -7 5 -1 1 1 3 and B 1 -2 -2 -3 -1 21 3 find the products

-4 4 4 If A = -7 5 -1 1 1 3

-4 4 4 If A = -7 5 -1 1 1 3 and B 1 -2 -2 -3 -1 21 3 find the products AB and BA and hence solve the system of equations x y + z = 4, x - 2y - 2z = 9, 2x + y +3z =1.

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