Question

RESOLVA AE MAN: Se A = 2X - 3 Calcule A³

Answer 1

Oie, Td Bom?!

• Sabendo que:

$A = 2x - 3$

• Calculando $A{}^{3}$ :

$A {}^{3} = (2x - 3) {}^{3}$

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

$A{}^{3}= 8x {}^{3} - 3 \: . \: 4x {}^{2} \: . \: 3 + 3 \: . \: 2x \: . \: 9 - 27$

$A{}^{3}= 8x {}^{3} - 36x {}^{2} + 54x - 27$

Att. Makaveli1996