Find the product:

(mn−kl + km) (kl−lm)

Consider the trinomial mn−kl + km and the binomial kl−lm.

Now, to get the product of mn−kl + km and kl−lm,we use the

distributive law i.e. (mn−kl + km)×( kl−lm) = mn(kl-lm)-kl(kl-lm) + km(-lm)

= mnkl-m²nl-k²l² + kl²m + kml-klm²

Therefore , the product of mn−kl + km and kl−lm is mnkl-m²nl-k²l² + kl²m + kml-klm²