3 2 x + 5*x - 3*x - 15
x^3 + 5*x^2 - 3*x - 1*15
/ ___\ / ___\ 1*(x + 5)*\x + \/ 3 /*\x - \/ 3 /
((1*(x + 5))*(x + sqrt(3)))*(x - sqrt(3))
-15.0 + x^3 + 5.0*x^2 - 3.0*x
/ 2\ \-3 + x /*(5 + x)
(-3 + x^2)*(5 + x)