Respostas

2014-05-05T20:12:20-03:00
(x-2y)³=
(3,0)x³(-2y)°-(3,1)x²(-2y)+(3,2)x(-2y)²+(3,3)x°(-2y)³=

x³-3x²(-2y)+3x4y+8y³=
x³+6x²y+12xy+8y³