El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$e^{\left(-2\right) x} \left(\left(- 12 x + 4 x\right) - 38\right) = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{19}{4}$$
Solución numérica$$x_{1} = 108.72430583263$$
$$x_{2} = 18.9839413671073$$
$$x_{3} = 64.7583271972979$$
$$x_{4} = 58.7670264556116$$
$$x_{5} = 28.8686412065877$$
$$x_{6} = 80.7415802748316$$
$$x_{7} = 42.8026628524208$$
$$x_{8} = 40.8091752866924$$
$$x_{9} = 76.7450983801919$$
$$x_{10} = 78.7432937326536$$
$$x_{11} = 68.7533920510512$$
$$x_{12} = 72.749012041436$$
$$x_{13} = 46.7913773050508$$
$$x_{14} = 50.7819355315128$$
$$x_{15} = 98.7293328522952$$
$$x_{16} = 20.9508504944391$$
$$x_{17} = 94.7316456527473$$
$$x_{18} = 100.728246386176$$
$$x_{19} = 24.9024389261996$$
$$x_{20} = 90.7341658660209$$
$$x_{21} = 54.773918786603$$
$$x_{22} = 106.725234799535$$
$$x_{23} = 88.7355126796086$$
$$x_{24} = 56.7703474266965$$
$$x_{25} = 104.726199762104$$
$$x_{26} = 66.7557838280788$$
$$x_{27} = 74.7470017056752$$
$$x_{28} = 70.7511386864743$$
$$x_{29} = 92.7328781257884$$
$$x_{30} = 110.723410883035$$
$$x_{31} = 60.7639303826408$$
$$x_{32} = 22.9242746927698$$
$$x_{33} = 36.8244402415915$$
$$x_{34} = 26.8841657317738$$
$$x_{35} = 96.7304649610827$$
$$x_{36} = 34.8334669720618$$
$$x_{37} = 48.7864554813299$$
$$x_{38} = 32.8436660364387$$
$$x_{39} = 30.855283720359$$
$$x_{40} = 52.7777700402134$$
$$x_{41} = 38.8163937243861$$
$$x_{42} = 86.7369227307643$$
$$x_{43} = 17.0263675277625$$
$$x_{44} = -4.75$$
$$x_{45} = 84.7384005849103$$
$$x_{46} = 82.7399512582417$$
$$x_{47} = 62.7610370698147$$
$$x_{48} = 102.727202855235$$
$$x_{49} = 44.7967573029169$$