Question

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Cảm ơn

Answer 1

`P=(1+5/(sqrtx-2)).(sqrtx-(x+2sqrtx+4)/(sqrtx+3))`

`=((sqrtx-2+5)/(sqrtx-2)).((x+3sqrtx-x-2sqrtx-4)/(sqrtx+3))`

`=(sqrtx+3)/(sqrtx-2).(sqrtx-4)/(sqrtx+3)`

`=(sqrtx-4)/(sqrtx-2)`

Answer 2

Answer 3

Ta có: \(P=\left(1+\dfrac{5}{\sqrt{x}-2}\right)\left(\sqrt{x}-\dfrac{x+2\sqrt{x}+4}{\sqrt{x}+3}\right)\)

\(=\dfrac{\sqrt{x}-2+5}{\sqrt{x}-2}\cdot\dfrac{x+3\sqrt{x}-x-2\sqrt{x}-4}{\sqrt{x}+3}\)

\(=\dfrac{\sqrt{x}-4}{\sqrt{x}-2}\)