Question: With A as in the Practice Problem, find a 5 x 3 matrix B and a 3 x 4 matrix C such that A =

With A as in the Practice Problem, find a 5 x 3 matrix B and a 3 x 4 matrix C such that A = BC. Generalize this idea to the case where A is m x n, A = LU, and U has only three nonzero rows.

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