Question

x-2.\(\sqrt{x}\)=0

 

Answer 1

\(x-2\cdot\sqrt{x}=0\)

=> x-2=0 hoặc \(\sqrt{x}\)=0

=>x=2 hoặc x=0

Answer 2

Trường hợp 1: \(x-2\sqrt{x}=0\)

\(\Rightarrow x-4.x=0\)

\(\Rightarrow-4x=0-x\)

\(\Rightarrow-4x=-x\)

\(\Rightarrow x=4\)

Trường hợp 2: \(x-2\sqrt{x}=0\)

\(\Rightarrow\sqrt{x}=0\Rightarrow x=0\)

Vậy: \(x\in\left\{4;0\right\}\)