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https://jjthetutor.com/let-a-and-b-be-arbitray-2x3-matrix-explain-why-every-column-of-the-3x3-matrix-c-must-belong-to-the-plane-in-r3/
Let A and B be arbitray 2x3 matrix explain why every column of the 3x3 matrix C must belong to the plane in R3