Question

分解公因式m∧2n﹙m-n﹚∧2-4mn﹙n-m﹚

Answer 1

m"n( m - n )" - 4mn( n - m )

= m"n( m - n )" + 4mn( m - n )

= mn( m - n )[ m( m - n ) + 4 ]

= mn( m - n )( m" - mn + 4 )

或者

= m"n( n - m )" - 4mn( n - m )

= mn( n - m )[ m( n - m ) - 4 ]

= mn( n - m )( mn - m" - 4 )