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-a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is?

and a second question:
-A circle has a center of square root 5. The equation of this circle is?

Please help me.

1 answer

the general equation of a circle with centre at (0,0) is
x^2 + y^2 = r^2

sub in your given point to find r^2 and you are done.

your second question makes no sense
the centre of a circle is a position, not a value.
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