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College Algebra  /  Alg 170  ·  Atom · ~20 seconds

The Swapped-Cases Error

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The swapped-cases error solves a less-than absolute value inequality as two rays, or a greater-than as a trap; the two shapes are not interchangeable.

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Solving |x| < 5 as rays admits x = 6 — but |6| = 6, and 6 < 5 is false. The ray answer welcomed a failing value.

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