Question

(x -4).(x-7) =0

Answer 1

\(\left(x-4\right).\left(x-7\right)=0\)

=> \(\orbr{\begin{cases}x-4=0\\x-7=0\end{cases}}\)=> \(\orbr{\begin{cases}x=4\\x=7\end{cases}}\)

Answer 2

giú mình nhé : please helf me

Answer 3

(x-4).(x-7)=0

\(\Rightarrow\orbr{\begin{cases}x-4=0\\x-7=0\end{cases}}\Rightarrow\hept{\begin{cases}x=0+4\\x=0+7\end{cases}}\Rightarrow\hept{\begin{cases}x=0\\x=7\end{cases}}\)

Vậy x={0;7}