PT$x\sqrt{x+3}-\dfrac{4x}{\sqrt{x+3}}=0$$x\sqrt{x+3}-\dfrac{4x\sqrt{x+3}}{x+3}=0$$\sqrt{x+3}\left ( x-\dfrac{4x}{x+3} \right ) = 0$$x(\sqrt{x+3})\left ( 1-\dfrac{4}{x+3} \right )=0$Vậy $x=0, 1.$
PT$x\sqrt{x+3}-\dfrac{4x}{\sqrt{x+3}}=0$$x\sqrt{x+3}-\dfrac{4x\sqrt{x+3}}{x+3}=0$$\sqrt{x+3}\left ( x-\dfrac{4x}{x+3} \right ) = 0$$x(\sqrt{x+3})\left ( 1-\dfrac{4}{x+3} \right )=0$Vậy $x=0, -1.$
PT$x\sqrt{x+3}-\dfrac{4x}{\sqrt{x+3}}=0$$x\sqrt{x+3}-\dfrac{4x\sqrt{x+3}}{x+3}=0$$\sqrt{x+3}\left ( x-\dfrac{4x}{x+3} \right ) = 0$$x(\sqrt{x+3})\left ( 1-\dfrac{4}{x+3} \right )=0$Vậy $x=0, 1.$