Question 1125327
zeros at -2.24, -1,0.5,2.24

factors are clearly (x+1)(2x-1).  That is 2x^2+x-1
The other factors are +/- sqrt (5), so they would be from x^2-5

{{{graph(300,300,-10,10,-10,10,2x^4+x^3-11x^2-5x+5)}}}