Question

Marco como melhor resposta, 60 pts

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

1) desenvolva:

a) (x+y)³ =x³+3x²y+3xy²+y³

b) (x−y)³=x³-3x²y+3xy²-y³

c) (m+3)³  =m³+9m² +27m+27

d) (a−1)³ =a³-3a² +3a+a³

e) (5−x)³ =125-75x +15x²-x³

f) (−a−b)³ =(-1)³ *(a+b)= -( a³+3a²b+3ab²+b³)=-a³-3a²b-3ab²-b³

2) Desenvolva:

a) (x+2y)³ =x³+6x²y+12xy²+8y³

b) (2x−y)³=8x³-12x²y +6xy²-y³

c) (1+2y)³=1+6y+12y²+8y³

d) (x−2a)³ =x³-6x²a+12xa² -8a³

e) (1−pq)³ =1-3pq+3p²q²-p³*q³

f) (3x²−1)³​ =27x⁶-27x⁴+9x²-1