【题目】____________÷0.3 x3y227 x4 y3+7 x3 y2-9 x2y.


参考答案:

【答案】8.1x7y5+2.1 x6y4-2.7 x5 y3

【解析】0.3x3y2(27x4y3+7x3y2-9x2y)8.1x7y5+2.1x6y4-2.7x5y3故答案为8.1x7y5+2.1x6y4-2.7x5y3.

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