Question 763683
{{{
3(x^2)(e^x)+(x^3)(e^x)=(3+x)*x^2*e^x=0
}}}
Zero product property leads to:

 {{{x^2=0}}}or{{{e^x=0}}} or {{{(3+x)=0}}}

so that

x=0, x=1 or x= -3


:)