1, \(x^2\) - \(x\) + \(\dfrac{1}{4}\) = 0
\(x^2\) - 2.\(x\).\(\dfrac{1}{2}\) + \(\dfrac{1}{4}\) = 0
(\(x\) - \(\dfrac{1}{2}\))2 = 0
\(x\) - \(\dfrac{1}{2}\) =0
\(x\) = \(\dfrac{1}{2}\)
2, \(x^2\) - 10\(x\) = -25
\(x^2\) - 10\(x\) + 25 = 0
(\(x\) - 5)2 = 0
\(x\) - 5 =0
\(x\) = 5