Question

Qual o cubo da diferenca de ( a- 2)³

Answer 1

Oie, Td Bom?!

$= (a - 2) {}^{3}$

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

$= a {}^{3} - 6a {}^{2} + 3a \: . \: 4 - 8$

$= a {}^{3} - 6a {}^{2} + 12a - 8$

Att. Makaveli1996