\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Compute \(A^{-1}\) for \(A = \begin{pmatrix} 1 & 1 \\ 2 & 5 \end{pmatrix}\), then use it to solve in batch the three Cramer systems \(A X_k = B_k\) for \(B_1 = (1, 0)^\top\), \(B_2 = (0, 1)^\top\), \(B_3 = (3, 9)^\top\).
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