pachecoelizabeth220 pachecoelizabeth220 24-04-2020 Mathematics contestada For which values of a, b, and c can you not use the quadratic formula? A. a=-1, b = -1,c=0 B. a=-1, b =-1,c = -1 c. a = 0,b=-1,c=-1 D. a=-1, b = 0,C=0