2x2+2y2-4x-2y+1=0x²+y²-2x-y+1/2=0(x-1)²+(y-1/2)²=3/4圆心是(1,1/2),半径是√3/2圆心到直线的距离=|3+2-5|/5=0所以直线与圆相交,且过圆心