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.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x
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)