x-y=4xy,试求2x+3xy-2y/x-2xy-y
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x-y=4xy,试求2x+3xy-2y/x-2xy-y
x-y=4xy,试求2x+3xy-2y/x-2xy-y
x-y=4xy,试求2x+3xy-2y/x-2xy-y
2x+3xy-2y/x-2xy-y
==> [ 2(x-y)+3xy ] / [ (x-y)-2xy]
==> x-y=4xy代入
==> 11xy/2xy
==> 11/2
2x+3xy-2y/x-2xy-y
=[2(x-y)+3xy]/[-2xy+(x-y)]
=11xy/2xy
=11/2
x-y=4xy,试求2x+3xy-2y/x-2xy-y
x-y=4xy,试求2x+3xy-2y/x-2xy-y
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