chickenbird6790 chickenbird6790 11-03-2024 Mathematics contestada Solve the quadratic equation x² + 3x - 4 = 0. a) a = 1, b = 3, c = -4b) a = 1, b = -3, c = 4c) a = -1, b = 3, c = 4d) a = -1, b = -3, c = -4