/ 3 2 \ lim \-12 - x + 3*x + 9*x/ x->1+
Limit(-12 - x^3 + 3*x^2 + 9*x, x, 1)
-1
= -1
/ 3 2 \ lim \-12 - x + 3*x + 9*x/ x->1-
-1.0