Suppose x and y are real numbers and x ∗ y = 12. Then x ̸= 5 and y ̸= −2. (a) What’s wrong with the following proof of the theorem? Proof. Suppose the conclusion of the theorem is false. Then x = 5 and y = −2. But then x∗ y = −10, which contradicts the given information that x∗ y = 12. Therefore the conclusion must be true

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