El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{\left(x - 9\right)^{2}}{x - 3} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 9$$
Solución numérica$$x_{1} = 9.00000230961849$$
$$x_{2} = 9.0000024182118$$
$$x_{3} = 9.00000179096024$$
$$x_{4} = 9.00000253452921$$
$$x_{5} = 9.00000094819569$$
$$x_{6} = 8.99999752381899$$
$$x_{7} = 9.00000250833246$$
$$x_{8} = 9.0000022239494$$
$$x_{9} = 8.99999955830662$$
$$x_{10} = 9.0000024652735$$
$$x_{11} = 9.00000257312797$$
$$x_{12} = 9.00000240395123$$
$$x_{13} = 9.00000252851718$$
$$x_{14} = 9.00000044012021$$
$$x_{15} = 9.00000255568533$$
$$x_{16} = 9.00000189157629$$
$$x_{17} = 9.00000254022955$$
$$x_{18} = 9.00000254564183$$
$$x_{19} = 9.00000255078734$$
$$x_{20} = 9.00000257702052$$
$$x_{21} = 9.00000149788843$$
$$x_{22} = 9.00000256035324$$
$$x_{23} = 9.00000204065207$$
$$x_{24} = 9.00000258432482$$
$$x_{25} = 9.00000258074943$$
$$x_{26} = 9.00000256906078$$
$$x_{27} = 9.00000248418695$$
$$x_{28} = 9.00000228431154$$
$$x_{29} = 9.00000250077808$$
$$x_{30} = 9.00000197316262$$
$$x_{31} = 9.00000233233997$$
$$x_{32} = 9.00000238842737$$
$$x_{33} = 9.00000209740797$$
$$x_{34} = 9.0000021875566$$
$$x_{35} = 9.00000256480692$$
$$x_{36} = 9.00000166377498$$
$$x_{37} = 9.00000247504996$$
$$x_{38} = 9.00000244351344$$
$$x_{39} = 9.00000249274523$$
$$x_{40} = 9.00000214580247$$
$$x_{41} = 9.00000127244024$$
$$x_{42} = 9.00000235285297$$
$$x_{43} = 9.00000252216718$$
$$x_{44} = 9.00000237146454$$
$$x_{45} = 9.000002454788$$
$$x_{46} = 9.00000243135724$$
$$x_{47} = 9.00000225595122$$
$$x_{48} = 9.00000251544988$$