Question 1016670
You can't factor it; the polynomial is prime.
You can solve using the quadratic formula, if it is an equation.  It will give complex roots.  
x=(1/2)(4 +/- sqrt (16-96)); sqrt -80=4i sqrt (5)
x=2 +./- 2i sqrt (5)
{{{graph(300,200,-10,10,-10,40,x^2-4x+24)}}}