`a, (x - 1/2)^2 = 0 ↔ x - 1/2 = 0 ↔ x = 1/2`
`b, (x - 2)^2 = 1 ↔` \(\left[ \begin{array}{l}x-2=1\\x-2=-1\end{array} \right.\)
`↔` \(\left[ \begin{array}{l}x=3\\x=1\end{array} \right.\)
`c, (2x - 1)^3 = -8 ↔ 2x - 1 = -2 ↔ 2x = - 1 ↔ x = -1/2`
`d, (x + 1/2)^2 = 1/16` `↔` \(\left[ \begin{array}{l}x+1/2=1/4\\x+1/2=-1/4\end{array} \right.\)
`↔` \(\left[ \begin{array}{l}x=-1/4\\x=-3/4\end{array} \right.\)
