1: Khi x=25 thì \(P=\dfrac{2\cdot5+1}{5}=\dfrac{11}{5}\)
2: \(Q=\dfrac{x-3\sqrt{x}+4-\sqrt{x}}{\sqrt{x}\left(\sqrt{x}-2\right)}=\dfrac{\sqrt{x}-2}{\sqrt{x}}\)
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