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If the expressions are w, x, y, z then to show that no two of them are equal is shown by(w-x)*(w-y)*(w-z)*(x-y)*(x-z)*(y-z) ≠ 0.


Note that w .ne. x AND x .ne. y AND y .ne. z is not enough since it is possible for x = z.

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6y ago
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Q: What is a number sentence that shows how two or more expressions are not equal?
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