2 2*x - 4*x - 5
2*x^2 - 4*x - 5
2 -5 - 4*x + 2*x
-5 - 4*x + 2*x^2
/ ____\ / ____\ | \/ 14 | | \/ 14 | |x + -1 + ------|*|x + -1 - ------| \ 2 / \ 2 /
(x - 1 + sqrt(14)/2)*(x - 1 - sqrt(14)/2)
-5.0 + 2.0*x^2 - 4.0*x
-5 + 2*x*(-2 + x)