関連ワード:  why root 2 is not a rational number    why square root of 2 is not a rational number    root 2 is not a rational number proof    root 2 is not a rational number true or false    prove root 2 is not a rational number    show that root 2 is not a rational number    prove that root 2 is not a rational number by long division method    prove that root 2 is not a rational number class 9    prove that root 2 is not a rational number by method of contradiction    prove that root 2 is not a rational number class 10