(1)3xy-4xy-(-2xy)
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(1)3xy-4xy-(-2xy)(1)3xy-4xy-(-2xy)(1)3xy-4xy-(-2xy)(1)3xy-4xy-(-2xy)=3xy-4xy+2xy=xy希望能够帮到你.
(1)3xy-4xy-(-2xy)
(1)3xy-4xy-(-2xy)
(1)3xy-4xy-(-2xy)
(1)3xy-4xy-(-2xy)
=3xy-4xy+2xy
=xy
希望能够帮到你.
3xy-4xy-(-2xy)
3xy-4xy-(-2xy)
(-3xy+2xy)-(4xy+xy)
(1)3xy-4xy-(-2xy)
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