已知实数x,y满足x2+y2-4x+6y+12=0,则| 2x-y-2 |的最小值是 5-根5 .
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![已知实数x,y满足x2+y2-4x+6y+12=0,则| 2x-y-2 |的最小值是 5-根5 .](/uploads/image/z/992502-54-2.jpg?t=%E5%B7%B2%E7%9F%A5%E5%AE%9E%E6%95%B0x%2Cy%E6%BB%A1%E8%B6%B3x2%2By2-4x%2B6y%2B12%3D0%2C%E5%88%99%7C+2x-y-2+%7C%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF+5-%E6%A0%B95+.)
已知实数x,y满足x2+y2-4x+6y+12=0,则| 2x-y-2 |的最小值是 5-根5 .
已知实数x,y满足x2+y2-4x+6y+12=0,则| 2x-y-2 |的最小值是 5-根5 .
已知实数x,y满足x2+y2-4x+6y+12=0,则| 2x-y-2 |的最小值是 5-根5 .
(x-2)²+(y+3)²=1
|2x-y-2|=|2cost+4-sint+3-2|=|2cost-sint+5|=(5-√5)