Question

(x-3).(2x-7)=0

Answer 1

\(\left(x-3\right).\left(2x-7\right)=0\)

\(\Rightarrow\left[\begin{matrix}x-3=0\\2x-7=0\end{matrix}\right.\Rightarrow\left[\begin{matrix}x=3\\x=\frac{7}{2}\end{matrix}\right.\)

Vậy x= 3 hoặc x= \(\frac{7}{2}\)

Answer 2

\(\left(x-3\right)\left(2x-7\right)=0\)

\(\Rightarrow\left[\begin{matrix}x-3=0\\2x-7=0\end{matrix}\right.\)\(\Leftrightarrow\left[\begin{matrix}x=3\\2x=7\end{matrix}\right.\)\(\Leftrightarrow\left[\begin{matrix}x=3\\x\in\varnothing\end{matrix}\right.\)

Vậy x = 3

Answer 3

(x-3).(2x-7)=0

=> x-3=0 Hoặc 2x-7=0

=>x=3 x=7/2

Vậy x=3;x=7/2