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How do I prove this?

How do I prove this?-example-1
User Reben
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1 Answer

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Answer:

it is because 8 is twice 4 and any number minus twice itself is the numbers opposite and the opposite of 4 which is -4 when multiplied by itself is -4 times -4 which equals 16 or the same as 4 squared

User Melchor
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