Word Count : 66

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Put $r=\sqrt{x^2+y^2}$. For $(x,y)\neq(0,0)$ we have by the AM–GM inequality $$ ___ ____ ____ __________ __________.
___ _________ ____ __________ ______ ________ __________.
____ ________ _______ ___ _________ ______ __________ __________ ____ _____ __________.
__________ ______ __________ _____ ___ ____ ___ ____.
___ ____ ______ __________ __________ _____ ________ ____.
________ ______ ____ __________ ________ ____ _________ ____ _________ ____ ________.
__________ _______ __________ ______ ___.
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