若实数x,y满足|x-y|+(y-2)²=0,则xy的值为
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若实数x,y满足|x-y|+(y-2)²=0,则xy的值为
若实数x,y满足|x-y|+(y-2)²=0,则xy的值为
若实数x,y满足|x-y|+(y-2)²=0,则xy的值为
若实数x,y满足|x-y|+(y-2)²=0,
则 |x-y|=0,(y-2)²=0,
x-y=0,y-2=0
解得:x=2,y=2
则 xy=2X2=4.
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