问题 填空题

(______)÷0.3x3y2=27x4y3+7x3y2-9x2y.

答案

(27x4y3+7x3y2-9x2y)•0.3x3y2=8.1x7y5+7x6y4-9x5y3

故答案为8.1x7y5+7x6y4-9x5y3

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