题目内容
经过圆x2+2x+y2=0的圆心C,且与直线x+y=0垂直的直线方程是( )
A.x+y+1=0 B.x+y-1=0
C.x-y+1=0 D.x-y-1=0
C
经过圆x2+2x+y2=0的圆心C,且与直线x+y=0垂直的直线方程是________.
经过圆x2+2x+y2=0的圆心C,且与直线x+y=0垂直的直线方程是
A.x+y+1=0
B.x+y-1=0
C.x-y+1=0
D.x-y-1=0
x+y+1=0
x+y-1=0
x-y+1=0
x-y-1=0
经过圆x2+2x+y2=0的圆心,且与直线x+y=0垂直的直线方程是________