Question

Любой, кроме 4 номера

Answer 1

3) $(sqrt[3]{3} +sqrt[3]{15} )*sqrt[3]{9} =sqrt[3]{3} *sqrt[3]{9} +sqrt[3]{15} *sqrt[3]{9} =sqrt[3]{27} +sqrt[3]{3*5*9} =3+3sqrt[3]{5} =3*(1+sqrt[3]{5} )$

б) $sqrt[3]{10-sqrt{73} } *sqrt[3]{10+sqrt{73} }=sqrt[3]{(10-sqrt{73} )*(10+sqrt{73} )} =$$sqrt[3]{100-73} =sqrt[3]{27} =sqrt[3]{3^{3} } =3$