f=-x^2+4x-3
domain...-infinity tu + infinity
for big x, -x^2 dominate so f gotu - infinity
for negativ x, -x^2 gotu - infinity
Yu get reesunabel numbers neer x=0,f=-3
at x=1, f=0, at x=2, f=1, at x=3, f=0, for bigger x, f negativ
at x=-1, f=-8, & for smaller x, f get smaller