Question

\(x+x^2=x^2+x^3\)

Answer 1

= 0

= 0

=> x = 0

Answer 2

\(x+x^2=x^2+x^3\)

\(\Leftrightarrow x+x^2-\left(x^2+x^3\right)=0\)

\(\Leftrightarrow x-x^3=0\)

\(\Leftrightarrow x.\left(1-x^2\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\1-x^2=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=1\\x=-1\end{matrix}\right.\)

Vậy : \(x\in\left\{0,1,-1\right\}\)

Answer 3

1 , 0 , -1