因为圆心在y轴上,则圆心O为(0,y)
则AO=BO
(-1+0)^2+(4-y)^2=(3-0)^2+(2-y)^2
1+16-8y+y^2=9+4-4y+y^2
4y=4
y=1
R^2=(-1+0)^2+(4-y)^2=1+9=10
所以圆方程是
x^2+(y-1)^2=10