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(0.12x^4y³-0.9x²y³)÷0.3x²y²等于?
人气:479 ℃ 时间:2020-01-31 09:31:16
解答
(0.12x^4y³-0.9x²y³)÷0.3x²y²
=0.4x²y-3y
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