Plot y = 



This plot is a  HINT.  It shows you visually that there are no real solutions.


To prove it, use Calculus.


The Calculus will show you, first, that the polynomial has only one min/max point, where the first derivative is zero.


Next, since the polynomial tends to +infinity wnen  x--->   and/or  x ---> , it becomes clear that the min/max is actually the minimum.


Finally, you can check that the minimum provides a positive value of the polynomial.  //  It is a simple calculation.


Thus you (actually, it was me) proved that the given equation has no real solution.