College Algebra / Alg 012 · Atom · ~20 seconds
The Invisible-Parentheses Error
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The invisible-parentheses error reads −3² as (−3)² and answers 9; the parentheses are not there, and the value is −9.
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On an exam line, −5² + 25 equals 0, not 50. The error adds parentheses the problem never wrote.
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Calculators disagree on this keystroke; the notation does not.
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