What is the sum of the squares of all real values of $x$ for which $|2-|x| |=1$?
Question:
What is the sum of the squares of all real values of $x$ for which $|2-|x| |=1$?
Answer:
Let's think step by step.

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What is the sum of the squares of all real values of $x$ for which $|2-|x| |=1$?
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