The absolute value equation is .
The equation means that the distance between r and 0 is . \ \
So, the solutions of the equation are .
The solutions of the equation are .
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.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ee57f88ee552109b2f7258bd5ea82523.png\")
means that the distance between r and 0 is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cdf6d4ba4a04eddfe43f6a06ae0958ca.png\")
. \ \
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.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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.