Question
In Exercises $13-20,$ write the equation of the circle in standard form. Then identify its center and radius. $$x^{2}+y^{2}-2 x+6 y+9=0$$
Step 1
The given equation is $x^{2}+y^{2}-2x+6y+9=0$. We can rewrite this as $(x^{2}-2x)+(y^{2}+6y)+9=0$. Show more…
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