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Proof WritingChallengeWriting It Up

Writing It Up · Challenge problem

A draft proves "x2≥2x−1x^2 \ge 2x - 1 for every real xx" like this: "x2≥2x−1x^2 \ge 2x - 1, so x2−2x+1≥0x^2 - 2x + 1 \ge 0, so (x−1)2≥0(x - 1)^2 \ge 0, which is true." What is the correct verdict?

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