Ta có: \(5x-13\sqrt{x}+6\)
\(=5x-10\sqrt{x}-3\sqrt{x}+6\)
\(=5\sqrt{x}\left(\sqrt{x}-2\right)-3\left(\sqrt{x}-2\right)\)
\(=\left(\sqrt{x}-2\right)\left(5\sqrt{x}-3\right)\)
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