\(\left(2x+10\right).\left(3-x\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}2x+10=0\\3-x=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\frac{10}{2}\\x=3\end{matrix}\right.\)
Bài làm
Ta có: ( 2x + 10 )( 3 - x ) = 0
=> \(\left[{}\begin{matrix}2x+10=0\\3-x=0\end{matrix}\right.\Rightarrow}\left[{}\begin{matrix}x=-5\\x=3\end{matrix}\right.\)
Vậy x = -5; hoặc x = 3