Question

$(3x - 1)$
elevado a três​

Answer 1

Oie, Td Bom?!

$= (3x - 1) {}^{3}$

$= (3x) {}^{3} - 3 \: . \: (3x) {}^{2} \: . \: 1 + 3 \: . \: 3x \: . \: 1 {}^{2} - 1 {}^{3}$

$= 27x {}^{3} - 3 \: . \: 9x {}^{2} \: . \: 1 + 3 \: . \: 3x \: . \: 1 - 1$

$= 27x {}^{3} - 27x {}^{2} + 9x - 1$

Att. Makaveli1996