Question

Tìm x€Q biết: 2x.(x-1/7)=0

Answer 1

2x.(x-1/7)=0

=>2x=0 hoặc x-1/7=0

\(\Rightarrow\orbr{\begin{cases}x=0\\x=\frac{1}{7}\end{cases}\left(tm\right)}\)

Answer 2

\(2x.\left(x-\frac{1}{7}\right)=0\)

=> \(\orbr{\begin{cases}2x=0\\x-\frac{1}{7}=0\end{cases}}\)

=> \(\orbr{\begin{cases}x=0\\x=\frac{1}{7}\end{cases}}\)