问题
填空题
设实数x、y满足x2+4y2+2x-4y+2=0,则x2y+2x
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答案
由题意知,x2+4y2+2x-4y+2=0变形得,(x+1)2+(2y-1)2=0
∴(x+1)2=0,x=-1
(2y-1)2=0,y=
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把x、y代入x2y+2x
y |
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设实数x、y满足x2+4y2+2x-4y+2=0,则x2y+2x
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由题意知,x2+4y2+2x-4y+2=0变形得,(x+1)2+(2y-1)2=0
∴(x+1)2=0,x=-1
(2y-1)2=0,y=
1 |
2 |
把x、y代入x2y+2x
y |
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