Question

Tìm x, biết

(x+1/2).(2/3-2.x)=0

 

Answer 1

\(\left(x+\frac{1}{2}\right).\left(\frac{2}{3}-2x\right)=0\)

\(\Rightarrow\orbr{\begin{cases}x+\frac{1}{2}=0\\\frac{2}{3}-2x=0\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=\frac{-1}{2}\\2x=\frac{2}{3}\end{cases}}\)

\(\Rightarrow\orbr{\begin{cases}x=\frac{-1}{2}\\x=\frac{1}{3}\end{cases}}\)

Answer 2

\(\left(x+\frac{1}{2}\right)\left(\frac{2}{3}-2x\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x+\frac{1}{2}=0\\\frac{2}{3}-2x=0\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=\frac{-1}{2}\\2x=\frac{2}{3}\Rightarrow x=\frac{1}{3}\end{cases}}\)

Answer 3

x+1/2=0 và 2/3-2x=0

đoạn sau dễ bạn tự giải nhé.good luck