xy的三次方-2x²y²+x的三次方y=?
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xy的三次方-2x²y²+x的三次方y=?xy的三次方-2x²y²+x的三次方y=?xy的三次方-2x²y²+x的三次方y=?xy的三次方-
xy的三次方-2x²y²+x的三次方y=?
xy的三次方-2x²y²+x的三次方y=?
xy的三次方-2x²y²+x的三次方y=?
xy的三次方-2x²y²+x的三次方y
=xy(y²-2xy+x²)
=xy(x-y)²
xy的三次方-2x²y²+x的三次方y
=xy(y^2-2xy+x^2)
=xy(x-y)^2
xy的三次方-2x²y²+x的三次方y
=xy(y²-2xy+x²)
=xy(x-y)²