Write the equation of the hyperbola 9x236y272x+72y216=0\displaystyle {9}{x}^{{2}}-{36}{y}^{{2}}-{72}{x}+{72}{y}-{216}={0} in standard form

(xh)2a2(yk)2b2=1\displaystyle \frac{{\left({x}-{h}\right)}^{{2}}}{{a}^{{2}}}-\frac{{\left({y}-{k}\right)}^{{2}}}{{b}^{{2}}}={1},
Where:
h =
k =
a =
b =