已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
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已知X+y=6,xy=7求x^2y+xy^2=已知X+y=6,xy=7x^2y+xy^2已知X+y=6,xy=7求x^2y+xy^2=已知X+y=6,xy=7x^2y+xy^2已知X+y=6,xy=7
已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
已知X+y=6,xy=7 求x^2y+xy^2=
已知X+y=6,xy=7 x^2y+xy^2
已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
x^2y+xy^2
=xy（x+y）
=7x6
=42
x^2y+xy^2
=xy(x+y)
=7*6
=42
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x^2y+xy^2
=xy(x+y)
=7X6
=42
原式=xy(x+y)=7×6=42
x^2y+xy^2=xy(x+y)=7*6=42
已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
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