Question

Answer 1

a: \(\Leftrightarrow\left[{}\begin{matrix}5x-1=0\\5x+1=0\end{matrix}\right.\Leftrightarrow x\in\left\{\dfrac{1}{5};-\dfrac{1}{5}\right\}\)

b: \(\Leftrightarrow\left[{}\begin{matrix}x-1=0\\3x-1=0\end{matrix}\right.\Leftrightarrow x\in\left\{1;\dfrac{1}{3}\right\}\)

c: \(\Leftrightarrow\left[{}\begin{matrix}\dfrac{2}{3}x+4=0\\x+3=0\\\dfrac{1}{2}x-1=0\end{matrix}\right.\Leftrightarrow x\in\left\{-6;-3;2\right\}\)