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X^2 = 16, therefore x = 4. Is this a valid conclusion? If not, give a counterexample.
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X^2 = 16, therefore x = 4.

Is this a valid conclusion? If not, give a counterexample.

User Duracell
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X^2 = 16. Replace X with 4 and it is 4^2 which is 16, 16=16 so the conclusion is valid
User Yvoytovych
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