question_answer

Factorise : \[{{l}^{2}}{{m}^{2}}n-l{{m}^{2}}{{n}^{2}}-{{l}^{2}}m{{n}^{2}}\]

Answer:

\[{{l}^{2}}{{m}^{2}}nl{{m}^{2}}{{n}^{2}}{{l}^{2}}m{{n}^{2}}=lmn\text{ }\left[ lmmnln \right]\]