\(\dfrac{3\sqrt{x}-9}{\sqrt{x}-5}-2\)
\(=\dfrac{3\sqrt{x}-9-2\left(\sqrt{x}-5\right)}{\sqrt{x}-5}\)
\(=\dfrac{3\sqrt{x}-9-2\sqrt{x}+10}{\sqrt{x}-5}\)
\(=\dfrac{\sqrt{x}+1}{\sqrt{x}-5}\)
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