VA ROG MULT, matem cl 9-a.

Valoarea minima a functiei este -delta/4a.
-delta/4a = [(2m+1)²-4*1*(m²-3)]/4 = (4m²+4m+1-4m²+12)/4 = (4m+13)/4
=> -delta/4a = -1/4
=> (4m+13)/4 = -1/4
4m+13 = -1
4m = -14
m = -7/2