/ 2\ | 3*x | lim |5 - 9*x + ----| x->1+\ 2 /
Limit(5 - 9*x + (3*x^2)/2, x, 1)
-5/2
= -2.5
/ 2\ | 3*x | lim |5 - 9*x + ----| x->1-\ 2 /
-2.5