已知圆C过点A(-2,3),且与直线4x+3y-26=0相切于点B(5,2).求圆的方程

k(BC)=-1/(-4/3)=3/4BC:y-2=(3/4)*(x-5)y=(3x-7)/4C[a,(3a-7)/4]r^2=CA^2=CB^2r^2=(a+2)^2+[(3a-7)/4-3]^2=(a-5)^2+[(3a-7)/4-2|^2a=1,C(1,-1),r^2=25C:(x-1)^2+(y+1)^2=25