Q127. What condition is necessary for the equation ax2 + bx + 9 = 0 to be a quadratic equation?Mathematics — Quadratic Equations — Question 127 of 200A. a = 0, b = 0B. a ≠ 0C. a = b = 0D. b can be any real numberPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →