Identify the values of a, b, and c that would be used in the quadratic formula to solve the equation −9x = 13 − 5x2. a. a = −9, b = 13, c = −5 b. a = −5, b = 9, c = 13 c. a = 13, b = 9, c = 5 d. a = 9, b = 5, c = 13