题目内容
多项式3x2y-7x4y2-
xy3+
按字母X的降幂排列为______.
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多项式3x2y-7x4y2-
xy3+
的项为,3x2y,-7x4y2,-
xy3,
;
按x降幂排列为-7x4y2-
xy3+3x2y+
.
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按x降幂排列为-7x4y2-
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