Question

help me

Answer 1

đk x > 0 ; x khác 25 

\(P=\left(\dfrac{3\sqrt{x}+15-\sqrt{x}+5}{x-25}\right):\left(\dfrac{3\sqrt{x}+15-\sqrt{x}+5}{\sqrt{x}\left(\sqrt{x}-5\right)}\right)\)

\(=\left(\dfrac{2\sqrt{x}+20}{x-25}\right):\left(\dfrac{2\sqrt{x}+20}{\sqrt{x}\left(\sqrt{x}-5\right)}\right)=\dfrac{\sqrt{x}}{\sqrt{x}+5}\)