Question

I2-xI+2=x

Ix-1I-x+1=0

Ix-1I=I2-xI

Answer 1

#)Giải :

\(\left|2-x\right|+2=x\)

\(\Rightarrow\orbr{\begin{cases}\left|2-x\right|=x\\2=x\end{cases}\Rightarrow x=2}\)

Vậy \(x=2\)

\(\left|x-1\right|\left|-x-1\right|=0\)

\(\Rightarrow\orbr{\begin{cases}\left|x-1\right|=0\\\left|-x-1\right|=0\end{cases}\Rightarrow\orbr{\begin{cases}x=1\\x=-1\end{cases}}}\)

Vậy \(x\in\left\{1;-1\right\}\)