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Linear AlgebraMediumRow Reduction & Rank

Row Reduction & Rank · Medium problem

What is the rank of M=(812−1−52−9−4−3−10351310)M = \begin{pmatrix}8 & 12 & -1 & -5 \\ 2 & -9 & -4 & -3 \\ -10 & 35 & 13 & 10\end{pmatrix}?