Question

Resolva:

(x - 2y) ao cubo

(3a - 2) ao cubo

Answer 1

(x-2y)³= (x-2y).(x-2y).(x-2y)

(x²-4xy+4y²).(x-2y)

x³-2x²y-4x²y+8xy²+4xy²-8y³
-2x²y-4x²y + 8xy³+4xy²-

(x³+2x²y+12xy³-8y³)

(3a-2)³

(3a-2).(3a-2).(3a-2)

(9a²-6a+4).(3a-2)

27a³-18a²-18a²+12a+12a-8

27a³+24a-8