Resposta :
→ Cálculo :
( + 3 )² = ( + 3 ) · ( + 3 ) = 9
( - 3 )² = ( - 3 ) · ( - 3 ) = 9
( + 2 )³ = ( + 2 ) · ( + 2 ) · ( + 2 ) = 8
( - 2 )³ = ( - 2 ) · ( - 2 ) · ( - 2 ) = -8
( + 3 )² = ( + 3 ) · ( + 3 ) = 9
( - 3 )² = ( - 3 ) · ( - 3 ) = 9
( + 2 )³ = ( + 2 ) · ( + 2 ) · ( + 2 ) = 8
( - 2 )³ = ( - 2 ) · ( - 2 ) · ( - 2 ) = -8