El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\left(x \left(- x - 1\right) - 1\right) e^{\frac{x}{2}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución numérica$$x_{1} = -85.0075513012757$$
$$x_{2} = -96.4297326893437$$
$$x_{3} = -133.497757316312$$
$$x_{4} = -79.4123980667447$$
$$x_{5} = -108.035305557951$$
$$x_{6} = -86.8931280996065$$
$$x_{7} = -129.562057564014$$
$$x_{8} = -139.410139225951$$
$$x_{9} = -113.881262669374$$
$$x_{10} = -117.790430544373$$
$$x_{11} = -94.5103407791064$$
$$x_{12} = -75.7495857909372$$
$$x_{13} = -2597.94494735161$$
$$x_{14} = -77.5729228620942$$
$$x_{15} = -81.2658122578309$$
$$x_{16} = -125.631767433241$$
$$x_{17} = -73.9451024980298$$
$$x_{18} = -111.930058662473$$
$$x_{19} = -137.43825613229$$
$$x_{20} = -127.596194138374$$
$$x_{21} = -106.092173831093$$
$$x_{22} = -135.467441315066$$
$$x_{23} = -123.66887099539$$
$$x_{24} = -141.383032613576$$
$$x_{25} = -90.6883690318185$$
$$x_{26} = -115.83477384876$$
$$x_{27} = -88.7870342672074$$
$$x_{28} = -72.1628758156891$$
$$x_{29} = -119.748086020037$$
$$x_{30} = -109.981340377722$$
$$x_{31} = -100.282792401227$$
$$x_{32} = -104.152189875889$$
$$x_{33} = -131.529271698667$$
$$x_{34} = -121.70760675942$$
$$x_{35} = -102.215627163222$$
$$x_{36} = -143.356882461443$$
$$x_{37} = -83.1313618730601$$
$$x_{38} = -98.3540308465656$$
$$x_{39} = -72.2254053840332$$
$$x_{40} = -92.5963600398962$$