(1+5^(2/3))(1-5^(2/3)+5^*4/3))

Question

(1+5^(2/3))(1-5^(2/3)+5^*4/3))

Answer 1

= (1+(∛5)²) (1-(∛5) +((∛5)²)²) - сумма кубов
= 1³ +  (∛5²)³ = 1+∛5^6 = 1 + 25 = 26