Question

1) desenvolva:


a) (x+y)³


b) (x−y)³


c) (m+3)³


d) (a−1)³


e) (5−x)³


f) (−a−b)³


2) Desenvolva:


a) (x+2y)³


b) (2x−y)³


c) (1+2y)³


d) (x−2a)³


e) (1−pq)³


f) (3x²−1)³

Answer 1

Resposta:

1) desenvolva:

a)  

(x + y )³ = x³+3x²y+3xy²+y³

b)

(x−y)³=x³-3x²y+3xy²-y³

c)

(m+3)³ = (m)³+3(m²)(3)+3(m)(3)²+(3)³ =

(m+3)³ = m³+9m²+27m+27

d)

(a - 1)³ = a³ +3a²(-1) + 3a(-1)² + (-1)³ = a³ - 3a² + 3a -1