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数学
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若|x-1|+(y+3)
2
=0,求1-xy-xy
2
的值.
人气:456 ℃ 时间:2019-11-01 02:15:20
解答
由题意得,x-1=0,y+3=0,
解得x=1,y=-3,
所以,1-xy-xy
2
=1-1×(-3)-1×(-3)
2
,
=1+3-9,
=4-9,
=-5.
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