Linear AlgebraMediumMatrices & Systems ShareMatrices & Systems · Medium problemFind the trace of A=(2−4−11−1−4211)A = \begin{pmatrix}2 & -4 & -1\\1 & -1 & -4\\2 & 1 & 1\end{pmatrix}A=212−4−11−1−41.Check Show answer Walk through it step by step Practice more like this Review this concept