Question

在平面直角坐标系下,到点A（-2,3）的距离和直线x+y-1=0的距离相等的点的轨迹方程是

Answer 1

√[(x+2)^2+(y-3)^2]=|x+y-1|/√2

x^2+y^2-2xy+10x-10y+25=0

(x-y+5)^2=0

x-y+5=0