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[x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y
人气:350 ℃ 时间:2019-10-02 20:42:06
解答
[x(x^2y^2-xy)-y(x^2-x^3y)]除以3x^2y
=(x³y²-x²y-x²y+x³y²)÷3x²y
=(2x³y²-2x²y)÷3x²y
=2xy/3-2/3
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