Question

x² - x= 0

Answer 1

`x^2 - x = 0`

`=> x(x - 1) = 0`

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

Vậy `x in {0; 1}`

Answer 2

 

x² - x= 0

=> x.(x-1)=0

=> x= 0

     x-1=0 => x=1

Vậy x thuộc {0;1}