2 x + 2*x - 5
x^2 + 2*x - 5
2 -5 + x + 2*x
-5 + x^2 + 2*x
/ ___\ / ___\ \x + 1 - \/ 6 /*\x + 1 + \/ 6 /
(x + 1 - sqrt(6))*(x + 1 + sqrt(6))
-5.0 + x^2 + 2.0*x
-5 + x*(2 + x)