関連ワード:  is the difference of two negative numbers always negative    is the difference of two negative integers always negative    the difference of two negative numbers is always negative true or false    the difference of two negative numbers is always negative counterexample    the difference of two negative numbers is always negative true or false example    the difference of two negative integers is always negative true or false    is the sum of two negative numbers always negative    is the product of two negative numbers always negative    is the quotient of two negative numbers always negative    is the sum of two negative integers always negative  
結果 : is the difference of two negative numbers always negative