Question 1207918
Equation of Circle often takes form  {{{(x-h)^2+(y-k)^2=r^2}}}.


This is like, you have an expression for {{{r^2}}}, radius-squared.


(A), center (1,0) and point (-3,2)

{{{(x-1)^2+(y-0)^2=(-3-1)^2+(2-0)^2}}}.  I let you do all the rest.