Find the product of the solutions of this equation 20x^2-39x+80=0

Hello : 
 20x²-39x+80=0
 a = 20   b = -39   c = 80

 the discriminant  b²-4ac  = (-39)²-4(20)(80)=1521-6400 = - 4879 < 0 
 no solution in : R 
but in  C    the product of the solutions of this equation is ; c/a = 80/20=4

25% increaseplus i think decrease i only know increase: ((