Question

(5x+1)(2x-5)=0

 

Answer 1

`(5x+1).(2x-5)=0`

`@TH1:`

`5x+1=0`

`5x=0-1`

`5x=-1`

`x=-1:5`

`x=-1/5`

`@TH2:`

`2x-5=0`

`2x=0+5`

`2x=5`

`x=5:2`

`x=5/2`

Vậy `x= {5/2; (-1)/5}`

`#LeMichael`

Answer 2

\((5x+1)(2x-5)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}5x+1=0\\2x-5=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{-1}{5}\\x=2,5\end{matrix}\right.\)