Find the maximum and minimum values, if any, of the following functions given by?$\;f(x)=(2x-1)^2+3$

Question

$\begin{array}{1 1} Maximum =3 \;minimum =2 \\ Maximum =3 \;No \;finite\;minimum\;value \\ Minimum=3, No\;finite\;maximum \;value \\ Maximum=9 \;minimum =0 \end{array}$