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  3. please explain how you proved the questions please include defenitions...

Question: please explain how you proved the questions please include defenitions...

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the square m . 9. Prove that for all real numbers x and y, if x2-y2, then x-y or z -v; ie, x= ±y. (Your proof should not ment

Please explain how you proved the questions, please include defenitions, propestions and everythinf needed to solve the question.


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