Question

\(x^3+2\sqrt{x}.x^2+2x=0\)

Answer 1

\(=x\left(x^2+2x\sqrt{x}+2\right)=0\)

\(\Leftrightarrow x=0\)

Answer 2

ĐK : \(x\ge0\)

P/t \(\Leftrightarrow x\left(x^2+2\sqrt{x}.x+2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x^2+2x\sqrt{x}+2=0\left(PTVN;x\ge0\right)\end{matrix}\right.\)