x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y-2)³-(x-y)³ 帮忙分解
x四次方+x³-3x²-4x-4x(x-1)+y(y+1)-2xy(x-2)³-(y-2)³-(x-y)³...
x四次方+x³-3x²-4x-4
x(x-1)+y(y+1)-2xy
(x-2)³-(y-2)³-(x-y)³ 展开
x(x-1)+y(y+1)-2xy
(x-2)³-(y-2)³-(x-y)³ 展开
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