Question

simplify the following​

Answer 1

This is the correct answer

Answer 2

( l-m ) ( m-n ) + ( m-n ) ( n-l ) - ( n-l ) ( l-m )

=> ( m-n ) { l - m + n - l } - ( n-l ) ( l-m )

=> ( m-n ) ( n-m ) - ( n-l ) ( l-m )

=> - ( m-n )^2 - ( n-l ) ( l-m )

=> -m^2 -n^2 + 2mn + l^2 - l ( m+n ) + mn

=> l^2 - m^2 - n^2 - l ( m+m )+ 3mn

Hope it helped you..

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