Vì (x-5).(x-3)=0
\(\Rightarrow\left\{{}\begin{matrix}x-5=0\\x-3=0\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}x=5\\x=3\end{matrix}\right.\)
\(\left(x-5\right)\left(x-3\right)=0\)
\(\left\{{}\begin{matrix}x-5=0\\x-3=0\end{matrix}\right.\)\(\Rightarrow\)\(\left\{{}\begin{matrix}x=0+5\\x=0+3\end{matrix}\right.\)\(\Rightarrow\)\(\left\{{}\begin{matrix}x=5\\x=3\end{matrix}\right.\)
Vậy \(x\in\left\{3;5\right\}\)
Tìm x :
(x-5).(x-3)=0
x-5 =0
x=0+5
x=5
Hoặc : x-3 =0
x=0+3
x=3
Vậy : x bằng 5 hoặc bằng 3
