Linear AlgebraChallengeMatrices & Systems ShareMatrices & Systems · Challenge problemHow many 2×22\times 22×2 matrices XXX with real entries satisfy X2=(4009)X^2 = \begin{pmatrix}4 & 0\\0 & 9\end{pmatrix}X2=(4009)?Check Show answer Walk through it step by step Practice more like this Review this concept