The center of circle is (h, k) = (0, 0) and radius(r) is 5.
The standard form of the equation of a circle is .
(Substitute for h, k and r)
(Simplify)
The equation of the circle is .
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(Substitute for h, k and r) ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3b74d44d461c9210ec11ff1fbc5f8f3d.png\")
(Simplify)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.