Question

Ao calcularmos (a + 3)³, obtemos...​

Answer 1

Oie, Td Bom?!

$= (a + 3) {}^{3}$

$= a {}^{3} + 3a {}^{2} \: . \: 3 + 3a \: . \: 3 {}^{2} + 3 {}^{3}$

$= a {}^{3} + 9a {}^{2} + 3a \: . \: 9 + 27$

$= a {}^{3} + 9a {}^{2} + 27a + 27$

Att. Makaveli1996