Giải thích các bước giải:
`(x-1/6)^2=1/9`
`=>(x-1/6)^2=(+- 1/3)^2`
`=>`\(\left[ \begin{array}{l}x-\frac{1}{6}=\frac{1}{3}\\x-\frac{1}{6}=\frac{-1}{3}\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=\frac{1}{3}+\frac{1}{6}\\x=\frac{-1}{3}+\frac{1}{6}\end{array} \right.\)
`=>`\(\left[ \begin{array}{l}x=\frac{1}{2}\\x=\frac{-1}{6}\end{array} \right.\)