Question

quanto é (x-1)² . (x-1) ?

Answer 1

Oie, Td Bom?!

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

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

$= (x - 1) {}^{2 + 1}$

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

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

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

Att. Makaveli1996