Question 707013
What you are saying for the inequality is not perfectly clear, but with the "x2" term, a guess is that you are indicating a quadratic inequality, {{{-2x+x^2-4>0}}}.


The quadratic part will have roots (as if an equation) at...use of quadratic formula solution...
{{{x=(-1+sqrt(-31))/(-4)}}}
OR
{{{x=(-1-sqrt(-31))/(-4)}}}
and simplified to 
{{{1/4+i*sqrt(31)/4}}} or {{{1/4-i*sqrt(31)/4}}}


None of that is what you are looking for.  The roots are complex but you want to solve an inequality, I assume to not expect any use of complex with imaginary parts.  


Try to state the exact problem exercise.  Otherwise, it seems this inequality has NO REAL SOLUTION.