=\(\sqrt{\left(x-\dfrac{1}{2}\right)}\)
= x-\(x-\dfrac{1}{2}nếu\) x ≥ \(\dfrac{1}{2}\)
= \(\dfrac{1}{2}\)-x nếu x <\(\dfrac{1}{2}\)
=\(\sqrt{\left(x^2\right)}\) +\(\sqrt{\left(x^2\right)}^2\)
=/x\(^2\)/+/\(x^2\)/
=x\(^2\) +x\(^2\) nếu x ≥0 x\(^2\)-x\(^2\) nếu x ≤ 0