/ 2\ lim \-40 - 2*x + 3*x / x->4+
Limit(-40 - 2*x + 3*x^2, x, 4)
0
= -1.022511032833e-31
/ 2\ lim \-40 - 2*x + 3*x / x->4-
= -4.78732376687224e-31
-1.022511032833e-31