а) (\sqrt{2}-1)(\sqrt{2}+1)= . б) (\sqrt{3}-1)(\sqrt{3}+1)= . в) (\sqrt{5}-\sqrt{2})(\sqrt{5}+\sqrt{2})= . г) (\sqrt{7}-\sqrt{5})(\sqrt{7}+\sqrt{5})= .

Задание

Вычисли

а) \((\sqrt{2}-1)(\sqrt{2}+1)=\) [ ].

б) \((\sqrt{3}-1)(\sqrt{3}+1)=\) [ ].

в) \((\sqrt{5}-\sqrt{2})(\sqrt{5}+\sqrt{2})=\) [ ].

г) \((\sqrt{7}-\sqrt{5})(\sqrt{7}+\sqrt{5})=\) [ ].