Question

(x-5)(x-7)=0

Answer 1

\(\left(x+5\right)\left(x-7\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x+5=0\\x-7=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-5\\x=7\end{matrix}\right.\)

Answer 2

=>x-5=0 hoặc x-7=0

=>x=5 hoặc x=7

Answer 3

\(\text{(x-5)(x-7)=0}\)

\(+\)) \(\text{x - 5 = 0 }\)\(\Rightarrow\) \(\text{x = 5}\)

\(+\)) \(\text{x - 7 = 0}\) \(\Rightarrow\) \(\text{x = 7}\)

vậy \(x=5\) hoặc \(\text{x = 7}\)