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1. a circle passes through the points 0,-3 and 0,3 and has radius 5. draw a sketch of the 2 possible positions of the circles and find their equations.

I don't know where to start, I am confused on the how to draw the 2 positions and how the radius is 5.
2. Go on wolfram alpha!
3. For your confusions on the radius being 5 - the two points (0,-3) and (0,3) are not the diameter.

If you draw a sketch of the graph, and mark on the two points, try and see how you could draw two circles.
4. (Original post by Vorsah)
a circle passes through the points 0,-3 and 0,3 and has radius 5. draw a sketch of the 2 possible positions of the circles and find their equations.

I don't know where to start, I am confused on the how to draw the 2 positions and how the radius is 5.
You know that the equation of a circle is

You know r and two values of x and y and this will allow you to find the possible values of a and b.

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