Donnie is solving the equation 2x2=27+3x with the quadratic formula. Which values could he use for a, b, and c? a = 2, b = −3 , c = ​−27​ a = 2, b = −27, c = ​−3​ a = 2, b = 3, c = 27 a = 2, b = 27, c = 3