Complete the equation of the circle centered at that passes through
I know I need to get into the form just not sure ?
I am at this point I need help to expand it out
I don't think you've bothered reading the posts above you. If you have the centre and radius of your circle, substitute them into this:
where is the centre of your circle and is the radius.
This is the general form of the equation of a circle. But since you are asked to set the equation equal to 0, you expand everything and move everything to one side.