m3 + m + 2 = 4m

(v) m³ + m + 2 = 4m

Sol. m³ + m + 2 = 4m

∴  m³ + m – 4m + 2 = 0

∴  m³ – 3m + 2 = 0

Here the maximum index of the variable m is 3.

So it is not a quadratic equation.