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【数学】化简2mn(3x²y-2xy²)-xy²+2x²y
如上!
人气:475 ℃ 时间:2019-08-19 11:29:36
解答

2mn(3x²y-2xy²)-xy²+2x²y
=2xymn(3x-2y)-xy(y-2x)
=xy(6mnx-4mny-y+2x)
=xy[(6mn+2)x-(4mn+1)y]
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