El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\left(\left(- 5 x^{2} - 7 x\right) - 2\right) e^{x + 2} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -1$$
$$x_{2} = - \frac{2}{5}$$
Solución numérica$$x_{1} = -67.6677998481556$$
$$x_{2} = -0.399999999999967$$
$$x_{3} = -83.4820362719515$$
$$x_{4} = -44.3473118910222$$
$$x_{5} = -107.324106453446$$
$$x_{6} = -101.355371291885$$
$$x_{7} = -121.264843928677$$
$$x_{8} = -65.6993554511684$$
$$x_{9} = -115.288222753932$$
$$x_{10} = -89.4330074999023$$
$$x_{11} = -113.296647792815$$
$$x_{12} = -119.272338977688$$
$$x_{13} = -69.6385788349611$$
$$x_{14} = -0.4$$
$$x_{15} = -52.0187780672648$$
$$x_{16} = -42.4621919633998$$
$$x_{17} = -63.7335397259299$$
$$x_{18} = -40.5972679964095$$
$$x_{19} = -97.3787399825448$$
$$x_{20} = -79.519801399703$$
$$x_{21} = -55.9045514664526$$
$$x_{22} = -87.4484473267646$$
$$x_{23} = -61.7706988427873$$
$$x_{24} = -105.334067713542$$
$$x_{25} = -93.4044903732619$$
$$x_{26} = -117.280126104242$$
$$x_{27} = -53.9586272877957$$
$$x_{28} = -109.314566511059$$
$$x_{29} = -50.086109466348$$
$$x_{30} = -46.2483030998253$$
$$x_{31} = -73.5861696671825$$
$$x_{32} = -95.3912952060786$$
$$x_{33} = -59.8112432658185$$
$$x_{34} = -48.1620192278274$$
$$x_{35} = -75.5625778435861$$
$$x_{36} = -81.5003493843836$$
$$x_{37} = -71.6114409101492$$
$$x_{38} = -111.305421655321$$
$$x_{39} = -77.5405025478924$$
$$x_{40} = -103.344478903139$$
$$x_{41} = -38.7586817206827$$
$$x_{42} = -85.4647644850067$$
$$x_{43} = -1$$
$$x_{44} = -57.8556636043457$$
$$x_{45} = -99.3667791241605$$
$$x_{46} = -91.418375861817$$