Use: There is no rational number whose square equals 2 to show that there is no rational number whose square equals 2/9.
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Hello, Originally Posted by wvlilgurl Use: There is no rational number whose square equals 2 to show that there is no rational number whose square equals 2/9. Assume there exists a rational number r whose square equals 2/9 : hence so since r is a rational, 3r is a rational. But since there is no rational whose square equals 2, we've got a contradiction.
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