2 x - 3*x - 5
x^2 - 3*x - 5
2 -5 + x - 3*x
-5 + x^2 - 3*x
/ ____\ / ____\ | 3 \/ 29 | | 3 \/ 29 | |x + - - + ------|*|x + - - - ------| \ 2 2 / \ 2 2 /
(x - 3/2 + sqrt(29)/2)*(x - 3/2 - sqrt(29)/2)
-5.0 + x^2 - 3.0*x
-5 + x*(-3 + x)