Identify the cofficients that would be used in the quadratic formula for this equation: 5x^2 =4x?

a) a = 5, b = - 4, c = 0
b) a = -5, b = 4, c =0
c) a = 5 , b = 4, c = 0
d) a = 5, b = 4, c = 1

a