Question

Desenvolva o cubo da diferença de dois termos :
a) (a-1)^3
b) (2x-3)^3
c) (2a-b)^3
d) (1-3a^2)^3
e) (5-x)^3

Answer 1

a) (a-1)^3  ->  a^3-3a^2+3a-1
b) (2x-3)^3 ->  8x^3-36x^2+54x-27
c) (2a-b)^3 ->  8x^3-12a^2 b+6ab^2-b^3
d) (1-3a^2)^3 -> 1-9a^2+27a4-27a6
e) (5-x)^3 ->  125-75x+15x^2-x^3

Answer 2

Resposta:

a) (a-1)³=  a³-3a²+3a-1

b) (2x-3)³=  8x³-36x²+54x-27

c) (2a-b)³=  8x³-12a² b+6ab²-b³

d) (1-3a²)³= 1-9a²+27a4-27a6

e) (5-x)³= 125-75x+15x²-x³