/ ________\ lim \x*\/ -4 + x / x->4+
Limit(x*sqrt(-4 + x), x, 4)
0
= 0.0561720937350307
/ ________\ lim \x*\/ -4 + x / x->4-
= (0.0 + 0.056142286179235j)
0.0561720937350307