Determine the rank of the matrix. [ 1 -2 5 -5 ] [ 2 -4 12 -6 ] [ -3 6 -15 15 ] A. 2 B. 4 C. 3 D. 1
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Let's start by swapping the first and third rows: $$ \begin{pmatrix} 6 & 0 & 0 \\ 5 & -5 & 12 \\ -2 & 2 & 4 \end{pmatrix} $$ Show more…
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