若实数x,y满足|x-y|+(y-2)2=0,则xy的值为_.
问题描述:
若实数x,y满足|x-y|+(y-2)2=0,则xy的值为______.
答
依题意得:x-y=0,y-2=0,∴y=2,x=2.∴xy=4.
若实数x,y满足|x-y|+(y-2)2=0,则xy的值为______.
依题意得:x-y=0,y-2=0,∴y=2,x=2.∴xy=4.