Question

Let f(x,y)=0 be the equation of a circle. If
f(0,k)=0 has equal roots k=2,2 and f(k,0)=0 has roots
k=45,5, then the centre of the circle is
A.(−2,29/10)
B.(29/10,2)
C.2,29/10)
D.(-2,-29/10)