General form of quadratic equation is ax² + bx + c = 0
a is coefficient of x²
b is coefficient of x
c is the constant
from -2x² + 4x - 3 = 0
the coefficient of x² is -2, therefore a = -2
the coefficient of x is 4, therefore b = 4
the constant is -3, therefore c = -3
The answer option 4