Option (A): 2x (x + 4) – 11 = x (x - 3) + 6 2x2+8x–11=x2–3x+6 x2+11x–17=0t his is a quadratic equation Option (B): 4x (x + 4) – 11 = 5x (x – 3) + 5 4x2+16x–11=5x2–15x+5 x2–31x+6=0 this is a quadratic equation Option (C): x (x + 2) - 15 = x (x - 5) + 11 x2+2x–15=x2–5x+11 7x – 26 = 0 this is not a quadratic equation So option C is the answer