keionleungkeion67 keionleungkeion67 29-02-2024 Mathematics contestada Which equation is quadratic in form? a. 3x⁵ + 8x³ + 6 = 0 b. 6x⁴ + 7x² – 3 = 0 c. 5x⁶ + x4 + 12 = 0 d. x⁹ + x³ – 10 = 0.