Question

giải phương trình sau:

2x(x-3)=x-3

Answer 1

\(2x\left(x-3\right)=x-3\)

\(\Leftrightarrow2x\left(x-3\right)-\left(x-3\right)=0\)

\(\Leftrightarrow\left(x-3\right)\left(2x-1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x-3=0\\2x-1=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=3\\x=\dfrac{1}{2}\end{matrix}\right.\)

Answer 2

`2x(x-3) = x-3`

`=> 2x(x-3) - (x-3) = 0`

`=> x-3 = 0` hoặc `2x-1=0`

`=> x=3` hoặc `x = 1/2`

Vậy...