what are the values of a, b, and c in the quadratic equation –2x2 4x – 3 = 0?

a. a = 2, b = 4, c = 3
b. a = 2, b = 4, c = –3
c. a = –2, b = 4, c = 3
d. a = –2, b = 4, c = – 3