El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$e^{x + 8} \left(8 - x\right) = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 8$$
Solución numérica$$x_{1} = -85.1329980618501$$
$$x_{2} = -47.369883839131$$
$$x_{3} = -61.2447823410302$$
$$x_{4} = -121.052202302045$$
$$x_{5} = -65.2198969347223$$
$$x_{6} = -97.0990398451986$$
$$x_{7} = -69.1981473783759$$
$$x_{8} = -59.2586229734047$$
$$x_{9} = -67.2086687051389$$
$$x_{10} = -51.3262172000187$$
$$x_{11} = -79.1541152286569$$
$$x_{12} = -43.4230249783974$$
$$x_{13} = -91.1148331129772$$
$$x_{14} = -75.1702113647074$$
$$x_{15} = -111.06914228288$$
$$x_{16} = -57.2735421114241$$
$$x_{17} = -101.089608132217$$
$$x_{18} = -103.085180982879$$
$$x_{19} = -73.1789726997072$$
$$x_{20} = -115.06199711462$$
$$x_{21} = -107.076847342498$$
$$x_{22} = -45.3950840173982$$
$$x_{23} = -63.2319064024203$$
$$x_{24} = -49.3470343910748$$
$$x_{25} = -81.146704685936$$
$$x_{26} = -41.4541901054407$$
$$x_{27} = -83.1396752246407$$
$$x_{28} = -55.2896724119287$$
$$x_{29} = -109.072920781941$$
$$x_{30} = -105.080930865701$$
$$x_{31} = -119.055352825341$$
$$x_{32} = -117.05861571791$$
$$x_{33} = -93.1093292372273$$
$$x_{34} = -95.1040701575302$$
$$x_{35} = -99.0942236453165$$
$$x_{36} = -113.065503606275$$
$$x_{37} = -39.4891864944529$$
$$x_{38} = -77.1619388762717$$
$$x_{39} = -53.3071694941258$$
$$x_{40} = -87.1266472537626$$
$$x_{41} = -89.1205993527235$$
$$x_{42} = -71.1882678183563$$
$$x_{43} = 8$$