Let f(x)=(x2)2\displaystyle {f{{\left({x}\right)}}}={\left({x}-{2}\right)}^{{2}}.

Find the inverse of f\displaystyle {f} restricted to [2,)\displaystyle {\left[{2},\infty\right)} .

f1(x)=\displaystyle {{f}^{{-{1}}}{\left({x}\right)}}=