题目内容
两圆x2+y2-4x+6y=0和x2+y2-6x=0的连心线方程为 ( )
A.x+y+3=0 B.2x-y-5=0
C.3x-y-9=0 D.4x-3y+7=0
C
两圆x2+y2-4x+6y=0和x2+y2-6x=0的连心线方程为
两圆x2+y2-4x+6y=0和x2+y2-6x=0的连心线方程为( )
A.x+y+3=0 B.2x-y-5=0.
C.3x-y-9=0. D.4x-3y+7=0