Question

Cum se rezolva asta? Va rog ajutati ma.

Answer 1

Desfacem parantezele:

$\displaystyle\left(3^{\frac23}+3^\frac13+1\right)\left(1-3^\frac13\right)=1\cdot3^{\frac23}+1\cdot3^\frac13+1\cdot1-3^\frac13\cdot3^{\frac23}-3^\frac13\cdot3^\frac13-3^\frac13\cdot1=\\\\3^{\frac23}+3^\frac13+1-3^{\frac33}-3^{\frac23}-3^{\frac13}=1-3^{\frac33}=1-3=-2$