関連ワード:  square root 2 is a rational number or not    under root 2 is an irrational number or not    prove that square root 2 is not a rational number    is √2 a rational number    is 1/√2 a rational number    is 2 root 2 a rational number    can a rational number be a square root  
結果 : square root 2 is a rational number or not