/ 2 \ |-20 + x - x| lim |------------| x->4+\ -4 + x /
Limit((-20 + x^2 - x)/(-4 + x), x, 4)
False
= -oo
/ 2 \ |-20 + x - x| lim |------------| x->4+\ -4 + x /
-oo
= -1200.99337748344
/ 2 \ |-20 + x - x| lim |------------| x->4-\ -4 + x /
oo
= 1214.99337748344
= 1214.99337748344