合并同类项: (1)-5yx²+4xy²-2xy+6x²y+2xy+5 (2)2(x-2y)²-7(x-2y)³+3(
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(1) x²y+4xy²+5
(2) 2(x-2y)²-7(x-2y)³+3(2y-x)²-(2y-x)³
=2(x-2y)²-7(x-2y)³+3(x-2y)²+(x-2y)³
=5(x-2y)²-6(x-2y)³
望采纳
(2) 2(x-2y)²-7(x-2y)³+3(2y-x)²-(2y-x)³
=2(x-2y)²-7(x-2y)³+3(x-2y)²+(x-2y)³
=5(x-2y)²-6(x-2y)³
望采纳
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(1) x²y+4xy²+5
(2)过程: 2(x-2y)²-7(x-2y)³+3(2y-x)²-(2y-x)³
=2(x-2y)²-7(x-2y)³+3(x-2y)²+(x-2y)³
=5(x-2y)²-6(x-2y)³
希望采纳,谢谢!
(2)过程: 2(x-2y)²-7(x-2y)³+3(2y-x)²-(2y-x)³
=2(x-2y)²-7(x-2y)³+3(x-2y)²+(x-2y)³
=5(x-2y)²-6(x-2y)³
希望采纳,谢谢!
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