已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?

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已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?已知1/x-1/y=3,则分式2x-14xy

已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?
已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?

已知1/x-1/y=3,则分式2x-14xy-2y/x-2xy-y的值为多少?
1/x-1/y=3 = (y-x)/(xy)=3
y-x=3xy
2x-14xy-2y/x-2xy-y = (-6xy-14xy)/(-3xy-2xy)=4