/ 2\ |-12 + x + x | lim |------------| x->4+| 2 | \4 + x - 5*x/
Limit((-12 + x + x^2)/(4 + x^2 - 5*x), x, 4)
False
= oo
/ 2\ |-12 + x + x | lim |------------| x->4+| 2 | \4 + x - 5*x/
oo
= 404.775330396476
/ 2\ |-12 + x + x | lim |------------| x->4-| 2 | \4 + x - 5*x/
-oo
= -400.553097345133
= -400.553097345133