Multiply the binomials:

kl + lm and k−l

Consider two binomials as kl + lm and k-l

Now,to get the product of two binomials kl + lm and k-l we use the

distributive law i.e. (kl + lm)×( k-l) = kl(k) + kl(-l) + lm(k) + lm(-l) = k²l-kl² + klm-l²m

Therefore , the product of (kl + lm) and ( k-l) is k²l-kl² + klm-l²m