The center of circle is and radius (r) is 4.
The standard form of the equation of a circle is .
Substitute the values of in the standard form of the circle equation.
The equation of the circle is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
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and radius (r) is 4.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dfeb4efd759ee756bb8a1b0262ef8a44.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=91073be626249ff595ee8bde7a06c5f6.png\")
in the standard form of the circle equation.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6b57bfe17ef08e63bae08961c0199f7d.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4354cd928992174c5fd157b5790f55a0.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4354cd928992174c5fd157b5790f55a0.png\")
.