2 x - 11*x + 10 -------------- 2 20 + 8*x - x
(10.0 + x^2 - 11.0*x)/(20.0 - x^2 + 8.0*x)
10 + x*(-11 + x) ---------------- 2 20 - x + 8*x
1 - x ----- 2 + x
-(-1 + x) ---------- 2 + x
3 -1 + ----- 2 + x