4x(2y-y)与2y(y-2x)的公因式是

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4x(2y-y)与2y(y-2x)的公因式是
4x(2y-y)与2y(y-2x)的公因式是

4x(2y-y)与2y(y-2x)的公因式是
4x(2y-y)
=8xy-4xy
=4xy
=2x*2y
2y(y-2x)
=2y^2-4xy
=2y(y-2x)
公因式是2y

2Y......................