\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Let \(A \in \mathbb{K}[X]^*\) and \(\lambda \in \mathbb{K}^*\). Show that \(A\) and \(A - \lambda\) are coprime in \(\mathbb{K}[X]\).
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