If \log( \frac{x-y}{2})= \frac{1}{2}(\logx+\logy) then x^2 + y^2 = ___________

CA CPT Dec 2017 Question Paper Quantitative Aptitude for online practice

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\log(\;\;{x-y}/{2})=\;\;{1}/{2}(\logx+\logy)

then

x^2 + y^2 =

___________

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