`(m+2)(m-2)=0` are quadratic equation ?

Solve : Decide the are quadratic equation ? m^3-5m^2+4=0

Decide which of the following are quadratic equations ? m^(3)-5m^(2)+4=0

Decided which of the following are quadratic equations ? (ii) m^3-5m^2+4=0

Decided which of the following are quadratic equations ? (ii) m^3-5m^2+4=0

Solve the following question. (ii) For the quadratic equation m^2+5m-14=0 , check whether m=3 and m=-7 are the roots or not ?