Question 1088302
Use a substitution.
It's a quadratic equation in disguise.
{{{u=e^x}}}
{{{u^2=(e^x)^2=e^(2x)}}}
.
.
{{{u^2-7u+12=0}}}
{{{(u-3)(u-4)=0}}}
Solve like you would a quadratic equation,
then back substitute to find the solution in x.