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数学
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先化简,再求值,x^2y-2(2xy^2-3x^2y-3) 3xy^2,其中x,y满足|x-2| (y 1
人气:116 ℃ 时间:2019-09-29 01:24:26
解答
x^2y-2(2xy^2-3x^2y-3) 3xy^2,其中x,y满足|x-2| (y 1=x²y-4xy²+6x²y+6-3xy²=7x²y-7xy²+6x-2=0;x=2;y-1=0;y=1;原式=7xy(x-y)+6=7×2×1×(2-1)+6=14+6=20;您好,很高兴为您解答,skyh...
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