Question

(2x - 4)(x - 5)=0

 

Answer 1

\(\Leftrightarrow\orbr{\begin{cases}2x-4=0\\x-5=0\end{cases}}\Rightarrow\orbr{\begin{cases}2x=4\\x=5\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x=5\end{cases}}\)

Vậy \(x\in\left\{2,5\right\}\)

Answer 2

( 2x - 4 ) ( x - 5 ) = 0

=> 2x - 4 = 0 hoặc x - 5 = 0

          2x = 4              x  = 5

            x = 2

Vậy x = 2 hoặc x = 5

Answer 3

\(\left(2x-4\right)\left(x-5\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}2x-4=0\\x-5=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}2x=4\\x=5\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=2\\x=5\end{cases}}\)

Vậy  \(x\in\left\{2,5\right\}\)